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Models/StepFun

StepFun: Step 3.5 Flash

StepFun flash lane for quick multimodal reasoning and coding assistance

Source-linked step Open weights Released 2026-01-29
API record Report
InputT
OutputT
Input price$0.105/M
Output price$0.314/M
Context256K
Max output256K
Providers15
Inference availability

Providers

Provider-specific identifiers, limits, and listed prices per million tokens. Every row links back to the provider's own documentation.

Report a price
Providers offering Step 3.5 Flash
ProviderProvider model IDContextMax outputInputOutputCache readCapabilitiesDocs
Qiniu stepfun/step-3.5-flash 64K 4.096K — — — Not listed Docs ↗
StepFun Step Plan (Global) step-3.5-flash 256K 256K — — — ReasoningTools Docs ↗
Nvidia stepfun-ai/step-3.5-flash 256K 16.384K — — — ReasoningTools Docs ↗
StepFun Step Plan (China) step-3.5-flash 256K 256K — — — ReasoningToolsJSON Docs ↗
Vercel AI Gateway stepfun/step-3.5-flash 262.114K 262.114K $0.09 $0.3 $0.02 ReasoningTools Docs ↗
Eden AI deepinfra/stepfun-ai/Step-3.5-Flash 262.144K 256K $0.09 $0.3 $0.02 ReasoningToolsJSON Docs ↗
CommandCode stepfun/Step-3.5-Flash 256K 256K $0.09 $0.3 $0.02 ReasoningTools Docs ↗
Hugging Face stepfun-ai/Step-3.5-Flash 262.144K 256K $0.1 $0.3 — ReasoningTools Docs ↗
StepFun (Global) step-3.5-flash 256K 256K $0.1 $0.3 $0.02 ReasoningToolsJSON Docs ↗
ZenMux stepfun/step-3.5-flash 256K 256K $0.1 $0.3 — ReasoningTools Docs ↗
EmpirioLabs AI step-3-5-flash 256K 131.072K $0.1 $0.3 $0.02 ReasoningTools Docs ↗
Kilo Gateway stepfun/step-3.5-flash 262.144K 65.536K $0.1 $0.3 — ReasoningTools Docs ↗
OpenRouter stepfun/step-3.5-flash 262.144K 65.536K $0.1 $0.3 — ReasoningTools Docs ↗
NanoGPT stepfun-ai/step-3.5-flash 262.144K 65.536K $0.1 $0.3 $0.05 Reasoning Docs ↗
StepFun (China) step-3.5-flash 256K 256K $0.105 $0.314 $0.021 ReasoningToolsJSON Docs ↗

Capability badges appear only where the provider catalog explicitly lists support. A blank cell means the source is silent, not that the feature is absent.

Listed rates

Price across providers

Input price per million tokens as published by each provider. Bars are drawn from listed rates only — no traffic weighting, since the catalog observes no requests.

Lowest input $0.09/M

Across 11 priced providers

Median input $0.1/M

Midpoint of listed rates

Highest input $0.105/M

1.2× the lowest listed rate

Output range $0.3 – $0.314

Per million output tokens

Vercel AI Gateway $0.09/M
Eden AI $0.09/M
CommandCode $0.09/M
Hugging Face $0.1/M
StepFun (Global) $0.1/M
ZenMux $0.1/M
EmpirioLabs AI $0.1/M
Kilo Gateway $0.1/M
OpenRouter $0.1/M
NanoGPT $0.1/M
StepFun (China) $0.105/M
Cost calculator

Estimate a workload

$0.00
Excludes taxes, non-token charges, and tiered discounts.

3 providers list the identical $0.09 input rate, so price alone will not separate them — compare context limits, max output, and capabilities above.

Context limits also differ by provider, from 64K to 262.144K tokens. Compare the provider table above before choosing on price alone.

Specification

Capabilities

Recorded from the source catalog and provider listings.

✓ Reasoning Yes
✓ Tool calling Yes
? Structured output Unknown
× Attachments No
× Vision input No
✓ Open weights Yes
Creator
StepFun
Model family
step
Knowledge cutoff
2025-01
License
Not documented
Release date
2026-01-29
Model ID
stepfun/step-3.5-flash

Weights: Hugging Face ↗

Published evaluations

Benchmarks

Every result stays attached to its source, version, metric and harness. Scores from different versions are never merged, and the profile below plots each benchmark against its own population rather than on a shared scale.

Benchmark registry
Benchmark profile
IntelligenceIntelligence Index SWE-Bench Verif…SWE-Bench Verified SciCodeSciCode AA Coding IndexArtificial Analysis Coding Index Terminal-Bench…Terminal-Bench Hard This model — Intelligence Index: 17 index (43.3th percentile) This model — SWE-Bench Verified: 74.4 resolved (46.9th percentile) This model — SciCode: 40.4 percent correct (90.7th percentile) This model — Artificial Analysis Coding Index: 31.6 index (82.7th percentile) This model — Terminal-Bench Hard: 27.3 success rate (84.1th percentile)

Each axis is this model's percentile among the 5 benchmarks it has published results for, measured against every other model with a score on that same benchmark. Percentiles are used because benchmarks do not share a scale — a 60 on one is not a 60 on another. Hover any point for the raw score.

Intelligence Index index Source ↗
Intelligence Index #190 of 334
SWE-Bench Verified resolved Source ↗
SWE-Bench Verified #17 of 32
SciCode percent correct · 2026-06-02 Source ↗
SciCode #3 of 27
Artificial Analysis Coding Index index · 2026-06-02 Source ↗
Artificial Analysis Coding Index #5 of 26
Terminal-Bench Hard success rate · 2026-06-02 Source ↗
Terminal-Bench Hard #4 of 22

Each strip shows every published score for that benchmark, with this model marked. The lighter shape behind the ticks is the density of results, and the dashed line is the median.

Cost against capability

Price and performance

Listed input price plotted against Intelligence Index, the benchmark with the widest published coverage that this model appears in.

0 31 61 $0.01 $0.1 $1 $10 $100 Nova 2 Lite — $0.3/M, score 13.4 Nova Lite 1.0 — $0.059/M, score 6.7 Nova Micro 1.0 — $0.035/M, score 5.9 Amazon: Nova Premier 1.0 — $2.5/M, score 9.2 Nova Pro 1.0 — $0.799/M, score 7.0 Claude Fable 5 — $10/M, score 49.6 Anthropic: Claude Fable 5.1 — $10/M, score 53.4 Anthropic: Claude Fable 5.1 (batch) — $5/M, score 53.4 Anthropic: Claude Fable 5 (batch) — $5/M, score 49.6 Anthropic: Claude Haiku 4.5 — $1/M, score 16.9 Anthropic: Claude Haiku 4.5 (batch) — $0.5/M, score 16.9 Anthropic: Claude Haiku 5.5 — $0.1/M, score 43.4 Anthropic: Claude Haiku 5.5 (batch) — $0.05/M, score 43.4 Anthropic: Claude Opus 4.1 — $15/M, score 22.8 Anthropic: Claude Opus 4.1 (batch) — $7.5/M, score 22.8 Anthropic: Claude Opus 4.5 — $5/M, score 29.1 Anthropic: Claude Opus 4.5 (batch) — $2.5/M, score 29.1 Anthropic: Claude Opus 4.6 — $5/M, score 31.9 Anthropic: Claude Opus 4.6 (batch) — $2.5/M, score 31.9 Anthropic: Claude Opus 4.7 — $5/M, score 40.7 Anthropic: Claude Opus 4.7 (batch) — $2.5/M, score 40.7 Anthropic: Claude Opus 4.8 — $5/M, score 41.8 Anthropic: Claude Opus 4.8 (batch) — $2.5/M, score 41.8 Claude Opus 5 — $5/M, score 50.8 Anthropic: Claude Opus 5.5 — $4/M, score 57.6 Anthropic: Claude Opus 5.5 (batch) — $2/M, score 57.6 Anthropic: Claude Opus 5 (batch) — $2.5/M, score 50.8 Anthropic: Claude Sonnet 4 — $3/M, score 18.9 Anthropic: Claude Sonnet 4.5 — $3/M, score 20.7 Anthropic: Claude Sonnet 4.5 (batch) — $1.5/M, score 20.7 Anthropic: Claude Sonnet 4.6 — $3/M, score 30.1 Anthropic: Claude Sonnet 4.6 (batch) — $1.5/M, score 30.1 Claude Sonnet 5 — $2/M, score 38.2 Anthropic: Claude Sonnet 5.5 — $2/M, score 56.0 Anthropic: Claude Sonnet 5.5 (batch) — $1/M, score 56.0 Anthropic: Claude Sonnet 5 (batch) — $1/M, score 38.2 Trinity Large Thinking — $0.25/M, score 10.8 Command A — $2.5/M, score 13.1 DeepSeek V3 0324 — $0.2/M, score 9.7 DeepSeek V3.1 — $0.19/M, score 13.7 DeepSeek-R1 — $0.58/M, score 11.4 DeepSeek R1 0528 — $0.2/M, score 13.1 DeepSeek: DeepSeek V3.1 Terminus — $0.27/M, score 14.8 DeepSeek V3.2 — $0.209/M, score 21.5 DeepSeek: DeepSeek V3.2 Exp — $0.27/M, score 16.6 DeepSeek V4 Flash — $0.15/M, score 24.4 DeepSeek V4 Flash 0731 — $0.035/M, score 34.3 DeepSeek: DeepSeek V4 Flash 0731 (batch) — $0.11/M, score 34.3 DeepSeek V4 Flash Vision Exp — $0.15/M, score 34.8 DeepSeek V4 Pro — $0.66/M, score 30.4 DeepSeek V4 Pro 0813 — $0.132/M, score 36.0 DeepSeek: DeepSeek V4 Pro 0813 (batch) — $0.66/M, score 36.0 DeepSeek V4.1 Flash — $0.02/M, score 24.7 DeepSeek V4.1 Flash 1017 — $0.15/M, score 39.5 DeepSeek: DeepSeek V4.1 Flash (batch) — $0.05/M, score 24.7 Gemini 2.5 Flash — $0.3/M, score 15.5 Gemini 2.5 Flash-Lite — $0.1/M, score 10.4 Google: Gemini 2.5 Flash Lite (batch) — $0.05/M, score 10.4 Google: Gemini 2.5 Flash (batch) — $0.15/M, score 15.5 Gemini 2.5 Pro — $1.25/M, score 16.1 Google: Gemini 2.5 Pro (batch) — $0.625/M, score 16.1 Gemini 3 Flash Preview — $0.5/M, score 26.3 Google: Gemini 3 Flash Preview (batch) — $0.25/M, score 26.3 Gemini 3.1 Flash Lite Preview — $0.25/M, score 15.6 Gemini 3.1 Pro Preview — $2/M, score 29.7 Google: Gemini 3.1 Pro Preview (batch) — $1/M, score 29.7 Gemini 3.5 Flash — $1.5/M, score 33.6 Gemini 3.5 Flash Lite — $0.3/M, score 22.2 Google: Gemini 3.5 Flash Lite (batch) — $0.15/M, score 22.2 Google: Gemini 3.5 Flash (batch) — $0.75/M, score 33.6 Gemini 3.6 Flash — $0.75/M, score 34.0 Google: Gemini 3.6 Flash (batch) — $0.375/M, score 34.0 Gemini 3.7 Flash — $0.75/M, score 39.6 Google: Gemini 3.7 Flash (batch) — $0.375/M, score 39.6 Gemini 3.8 Flash — $0.75/M, score 40.9 Google: Gemini 3.8 Flash (batch) — $0.375/M, score 40.9 Gemini 4 Argon — $2/M, score 52.6 Google: Gemini 4 Argon (batch) — $1/M, score 52.6 Gemma 3 12B IT — $0.04/M, score 3.8 Gemma 3 27B IT — $0.08/M, score 4.9 Gemma 3 4B IT — $0.04/M, score 4.8 Gemma 4 26B A4B IT — $0.042/M, score 16.7 Gemma 4 31B IT — $0.1/M, score 14.7 Google: Gemma 4 31B (batch) — $0.39/M, score 15.4 IBM: Granite 4.0 Micro — $0.017/M, score 5.1 IBM: Granite 4.2 8B — $0.06/M, score 11.1 Mercury 2 — $0.25/M, score 10.8 Mercury 2.5 — $0.2/M, score 12.3 inclusionAI: Ling-2.6-flash — $0.01/M, score 14.2 Ling 3.0 Flash — $0.021/M, score 20.1 Ling 3.0 Flash Fin — $0.075/M, score 22.6 Ling 3.0 Flash VL — $0.06/M, score 24.6 Ling 3.1 Flash — $0.075/M, score 41.1 inclusionAI: Ring-2.6-1T — $0.075/M, score 31.1 Kwaipilot: KAT-Coder-Pro V2 — $0.3/M, score 33.7 LongCat-2.0 — $0.3/M, score 19.1 Meta: Llama 3.1 70B Instruct — $0.4/M, score 6.6 Meta: Llama 3.1 8B Instruct — $0.05/M, score 6.9 Meta: Llama 3.2 1B Instruct — $0.027/M, score 4.8 Meta: Llama 3.2 3B Instruct — $0.051/M, score 5.7 Meta: Llama 3.3 70B Instruct — $0.1/M, score 7.7 Meta: Llama 4 Maverick — $0.188/M, score 9.3 Meta: Llama 4 Scout — $0.1/M, score 6.5 Muse Glimmer 30B — $0.2/M, score 17.5 Muse Spark 1.1 — $1.25/M, score 33.7 Muse Spark 1.2 — $1.25/M, score 39.6 Muse Spark 1.3 — $1.25/M, score 48.1 Microsoft: Phi 4 — $0.07/M, score 5.9 MiniMax: MiniMax M1 — $0.55/M, score 11.7 MiniMax: MiniMax M2 — $0.255/M, score 18.6 MiniMax: MiniMax M2.1 — $0.3/M, score 20.9 MiniMax: MiniMax M2.5 — $0.3/M, score 22.8 MiniMax: MiniMax M2.7 — $0.3/M, score 22.8 MiniMax: MiniMax M3 — $0.3/M, score 29.2 MiniMax: MiniMax M3.1 Flash — $0.15/M, score 42.7 MiniMax: MiniMax M3 (batch) — $0.3/M, score 29.2 Mistral: Devstral 2 2512 — $0.4/M, score 8.6 Mistral: Ministral 3 14B 2512 — $0.2/M, score 6.0 Mistral: Ministral 3 3B 2512 — $0.1/M, score 4.8 Mistral: Ministral 3 8B 2512 — $0.15/M, score 5.5 Mistral: Ministral 3 8B 2512 (batch) — $0.075/M, score 5.5 Mistral Large — $2/M, score 5.8 Mistral Large 2407 — $2/M, score 7.6 Mistral: Mistral Large 3 2512 — $0.5/M, score 9.3 Mistral: Mistral Large 3 2512 (batch) — $0.25/M, score 9.3 Mistral: Mistral Large 4 — $1.36/M, score 38.4 Mistral: Mistral Medium 3 — $0.4/M, score 9.0 Mistral: Mistral Medium 3.5 — $1.5/M, score 14.2 Mistral: Mistral Medium 3.5 (batch) — $0.75/M, score 14.2 Mistral: Mistral Medium 3.1 — $0.4/M, score 9.2 Mistral: Mistral Medium 3.1 (batch) — $0.2/M, score 9.2 Mistral: Saba — $0.2/M, score 6.5 Mistral: Mistral Small 3 — $0.05/M, score 6.7 Mistral: Mistral Small 4 — $0.15/M, score 11.3 Mistral: Mistral Small 4 (batch) — $0.075/M, score 11.3 Mistral: Mixtral 8x22B Instruct — $2/M, score 5.7 Kimi K2 0711 — $0.4/M, score 12.7 Kimi K2 Instruct 0905 — $0.6/M, score 15.3 Kimi K2 Thinking — $0.4/M, score 22.0 Kimi K2.5 — $0.375/M, score 23.5 Kimi K2.6 — $0.95/M, score 27.0 Kimi K2.7 Code — $0.95/M, score 25.8 MoonshotAI: Kimi K2.7 Code (batch) — $0.475/M, score 43.0 Kimi K3 — $3/M, score 43.6 Kimi K3.1 Pro — $2/M, score 55.1 MoonshotAI: Kimi K3 (batch) — $2.28/M, score 43.6 Nex-N2-Pro — $0.5/M, score 41.7 Hermes 3 405B Instruct — $1/M, score 7.4 Hermes 3 70B Instruct — $0.7/M, score 6.7 Hermes 4 405B — $0.996/M, score 7.5 Nemotron 3 Nano 30B A3B — $0.05/M, score 8.9 Nemotron 3 Super 120B A12B — $0.05/M, score 12.8 Nemotron 3 Ultra 550B A55B — $0.1/M, score 22.9 NVIDIA: Nemotron 3 Ultra (batch) — $0.6/M, score 38.3 Nemotron 3.5 Lightning 30B A3B — $0.025/M, score 12.9 NVIDIA: Nemotron 3.5 Super VL — $0.15/M, score 26.5 GPT-3.5-turbo — $0.5/M, score 5.5 OpenAI: GPT-3.5 Turbo (batch) — $0.25/M, score 5.5 GPT-4 — $30/M, score 6.7 GPT-4 Turbo — $10/M, score 7.0 OpenAI: GPT-4 Turbo (batch) — $5/M, score 7.0 GPT-4.1 — $2/M, score 12.7 GPT-4.1 mini — $0.4/M, score 10.2 OpenAI: GPT-4.1 Mini (batch) — $0.2/M, score 10.2 GPT-4.1 nano — $0.1/M, score 7.8 OpenAI: GPT-4.1 Nano (batch) — $0.05/M, score 7.8 OpenAI: GPT-4.1 (batch) — $1/M, score 12.7 GPT-4o (2024-05-13) — $5/M, score 7.3 GPT-4o (2024-08-06) — $2.5/M, score 7.7 GPT-4o (2024-11-20) — $2.5/M, score 8.4 GPT-4o mini — $0.15/M, score 6.7 OpenAI: GPT-4o-mini (batch) — $0.075/M, score 6.7 GPT-5 — $1.25/M, score 23.0 GPT-5 Mini — $0.25/M, score 20.6 OpenAI: GPT-5 Mini (batch) — $0.125/M, score 20.6 GPT-5 Nano — $0.05/M, score 13.0 OpenAI: GPT-5 Nano (batch) — $0.025/M, score 13.0 GPT-5.1 — $1.25/M, score 24.7 GPT-5.1 Codex — $1.07/M, score 23.7 GPT-5.1 Codex mini — $0.22/M, score 20.4 OpenAI: GPT-5.1 (batch) — $0.625/M, score 24.7 GPT-5.2 — $1.75/M, score 30.4 GPT-5.2 Codex — $0.14/M, score 28.5 OpenAI: GPT-5.2 (batch) — $0.875/M, score 30.4 GPT-5.3 Codex — $1.75/M, score 32.5 GPT-5.4 — $2.5/M, score 39.0 GPT-5.4 mini — $0.75/M, score 24.1 OpenAI: GPT-5.4 Mini (batch) — $0.375/M, score 24.1 GPT-5.4 nano — $0.2/M, score 20.7 OpenAI: GPT-5.4 Nano (batch) — $0.1/M, score 20.7 OpenAI: GPT-5.4 (batch) — $1.25/M, score 39.0 GPT-5.5 — $5/M, score 38.4 OpenAI: GPT-5.5 (batch) — $2.5/M, score 38.4 GPT-5.6 Luna — $0.2/M, score 37.3 OpenAI: GPT-5.6 Luna (batch) — $0.1/M, score 37.3 GPT-5.6 Sol — $4/M, score 47.0 OpenAI: GPT-5.6 Sol (batch) — $2/M, score 47.0 GPT-5.6 Terra — $2/M, score 42.1 OpenAI: GPT-5.6 Terra (batch) — $1/M, score 42.1 OpenAI: GPT-5 (batch) — $0.625/M, score 23.0 GPT-6 Astra — $10/M, score 52.7 OpenAI: GPT-6 Astra (batch) — $5/M, score 52.7 GPT-6 Luna — $0.1/M, score 38.1 OpenAI: GPT-6 Luna (batch) — $0.05/M, score 38.1 GPT-6 Sol — $2/M, score 47.6 OpenAI: GPT-6 Sol (batch) — $1/M, score 47.6 GPT-6.1 Sol — $2/M, score 51.8 OpenAI: GPT-6.1 Sol (batch) — $1/M, score 51.8 GPT OSS 120B — $0.03/M, score 11.6 OpenAI: gpt-oss-120b (batch) — $0.03/M, score 11.6 GPT OSS 20B — $0.018/M, score 10.0 OpenAI: gpt-oss-20b (batch) — $0.024/M, score 10.0 o1 — $15/M, score 15.2 o1-pro — $150/M, score 12.4 o3 — $2/M, score 20.2 o3-mini — $1.1/M, score 12.5 OpenAI: o3 Mini High — $1.1/M, score 11.0 OpenAI: o3 Mini High (batch) — $0.55/M, score 15.7 OpenAI: o3 Mini (batch) — $0.55/M, score 12.5 o3-pro — $20/M, score 21.9 OpenAI: o3 (batch) — $1/M, score 20.2 o4-mini — $1.1/M, score 16.7 OpenAI: o4 Mini (batch) — $0.55/M, score 16.7 Sonar — $1/M, score 7.7 Sonar Pro — $3/M, score 7.6 Sonar Reasoning Pro — $2/M, score 11.8 Qwen2.5 72B Instruct — $0.36/M, score 7.7 Qwen2.5 Coder 32B Instruct — $0.66/M, score 6.7 Qwen: Qwen3 14B — $0.12/M, score 6.7 Qwen: Qwen3 235B A22B — $0.455/M, score 9.5 Qwen: Qwen3 235B A22B Instruct 2507 — $0.09/M, score 12.0 Qwen: Qwen3 235B A22B Thinking 2507 — $0.45/M, score 12.7 Qwen: Qwen3 30B A3B — $0.12/M, score 7.6 Qwen: Qwen3 30B A3B Instruct 2507 — $0.09/M, score 7.5 Qwen: Qwen3 30B A3B Thinking 2507 — $0.2/M, score 9.8 Qwen: Qwen3 32B — $0.08/M, score 7.3 Qwen: Qwen3 8B — $0.117/M, score 7.3 Qwen: Qwen3 Coder 480B A35B — $0.3/M, score 11.9 Qwen: Qwen3 Coder 30B A3B Instruct — $0.07/M, score 9.6 Qwen: Qwen3 Coder Next — $0.12/M, score 9.2 Qwen: Qwen3 Max — $0.78/M, score 15.6 Qwen: Qwen3 Max Thinking — $0.78/M, score 21.3 Qwen: Qwen3 Next 80B A3B Instruct — $0.09/M, score 9.6 Qwen: Qwen3 Next 80B A3B Thinking — $0.15/M, score 11.2 Qwen: Qwen3 VL 235B A22B Instruct — $0.21/M, score 9.9 Qwen: Qwen3 VL 235B A22B Thinking — $0.4/M, score 13.4 Qwen: Qwen3 VL 30B A3B Instruct — $0.15/M, score 7.9 Qwen: Qwen3 VL 30B A3B Thinking — $0.29/M, score 9.5 Qwen: Qwen3 VL 32B Instruct — $0.104/M, score 11.9 Qwen: Qwen3 VL 8B Instruct — $0.25/M, score 7.3 Qwen: Qwen3 VL 8B Thinking — $0.18/M, score 8.2 Qwen: Qwen3.5-122B-A10B — $0.4/M, score 17.7 Qwen: Qwen3.5-27B — $0.27/M, score 22.9 Qwen: Qwen3.5-35B-A3B — $0.14/M, score 19.3 Qwen: Qwen3.5 397B A17B — $0.5/M, score 21.4 Qwen: Qwen3.5-9B — $0.17/M, score 13.3 Qwen: Qwen3.5-9B (batch) — $0.17/M, score 21.8 Qwen: Qwen3.6 27B — $0.25/M, score 21.4 Qwen: Qwen3.6 35B A3B — $0.1/M, score 18.2 Qwen: Qwen3.6 Max Preview — $1.027/M, score 28.4 Qwen: Qwen3.6 Plus — $0.325/M, score 27.0 Qwen: Qwen3.7 Max — $1.475/M, score 29.5 Qwen: Qwen3.7 Plus — $0.32/M, score 25.2 Qwen: Qwen3.7 Plus (batch) — $0.23/M, score 25.2 Qwen: Qwen3.8 2.4T A95B — $2/M, score 39.9 Qwen: Qwen3.8 2.4T A95B (batch) — $2/M, score 39.9 Qwen: Qwen3.8 27B — $0.2/M, score 33.7 Qwen: Qwen3.8 Max — $2/M, score 53.4 Qwen: Qwen3.8 Max (0902) — $2/M, score 45.4 Reka Flash 3 — $0.1/M, score 6.4 Step 3.5 Flash — $0.105/M, score 17.0 Step 3.7 Flash — $0.202/M, score 19.5 Step 5 Preview — $1.046/M, score 43.7 Hy3 preview — $0.18/M, score 25.3 Inkling — $1/M, score 25.0 Inkling Small — $0.3/M, score 25.7 Thinking Machines: Inkling Small (batch) — $0.5/M, score 26.1 Thinking Machines: Inkling (batch) — $1/M, score 25.0 Solar Mini 4 — $0.1/M, score 24.1 Upstage: Solar Pro 3 — $0.15/M, score 7.8 Solar Pro 4 — $0.3/M, score 28.2 SpaceXAI: Grok 4.20 — $1.25/M, score 25.7 SpaceXAI: Grok 4.3 — $1.25/M, score 24.9 SpaceXAI: Grok 4.3 (batch) — $1/M, score 24.9 SpaceXAI: Grok 4.5 — $2/M, score 38.8 SpaceXAI: Grok 4.6 — $2/M, score 44.3 SpaceXAI: Grok 4.7 — $2/M, score 46.4 SpaceXAI: Grok Build 0.1 — $1/M, score 27.2 MiMo-V2.5 — $0.14/M, score 21.8 MiMo-V2.5-Pro — $0.435/M, score 26.0 MiMo-V2.6-Flash — $0.14/M, score 37.9 MiMo-V2.6-Pro — $0.435/M, score 46.3 Z.ai: GLM 4.5 — $0.6/M, score 12.8 Z.ai: GLM 4.5 Air — $0.13/M, score 11.1 Z.ai: GLM 4.5V — $0.6/M, score 7.6 Z.ai: GLM 4.6 — $0.55/M, score 18.5 Z.ai: GLM 4.6V — $0.3/M, score 11.2 Z.ai: GLM 4.7 — $0.54/M, score 22.2 Z.ai: GLM 4.7 Flash — $0.061/M, score 14.9 Z.ai: GLM 5 — $1/M, score 27.9 Z.ai: GLM 5 Turbo — $1.2/M, score 26.6 Z.ai: GLM 5.1 — $1.4/M, score 26.1 Z.ai: GLM 5.2 — $0.034/M, score 33.7 Z.ai: GLM 5.2 (batch) — $0.7/M, score 33.7 Z.ai: GLM 5.3 — $0.079/M, score 44.8 Z.ai: GLM 5.3 Flash — $0.15/M, score 41.8 Z.ai: GLM 5.3 Flash (batch) — $0.05/M, score 41.8 Z.ai: GLM 5.3 (batch) — $0.45/M, score 44.8 Z.ai: GLM 5V Turbo — $1.2/M, score 23.5 Step 3.5 Flash Input price per million tokens (log scale) Index

The stepped line is the efficient frontier: at each price, the best score available for that money or less. A model sitting on it is not being beaten by anything cheaper. Price is log-scaled because listed rates span four orders of magnitude. Only models with both a listed price and a score on this benchmark can appear.

Catalog activity

Change log

Field-level changes detected between successful source imports.

Full change log
Max Output Tokens65536 → 256000
Context Length262144 → 256000
Price Completion0.3 → 0.31384
Price Prompt0.09999999999999999 → 0.10461
Max Output Tokens256000 → 65536
Context Length256000 → 262144
Price Completion0.31384 → 0.3
Price Prompt0.10461 → 0.09999999999999999
Max Output Tokens65536 → 256000
Context Length262144 → 256000
Provenance

Sources & verification

Every figure on this page traces back to one of these records.

Methodology
Last verified
Oct 24, 2026
Status
Source-linked
Confidence
Medium
Catalog source
Models.dev
Models.devcatalog ↗Qiniu documentationprovider documentation ↗StepFun Step Plan (Global) documentationprovider documentation ↗Nvidia documentationprovider documentation ↗StepFun Step Plan (China) documentationprovider documentation ↗Vercel AI Gateway documentationprovider documentation ↗Eden AI documentationprovider documentation ↗CommandCode documentationprovider documentation ↗Hugging Face documentationprovider documentation ↗StepFun (Global) documentationprovider documentation ↗ZenMux documentationprovider documentation ↗EmpirioLabs AI documentationprovider documentation ↗
Public API

Use this record

Fetch the complete source-linked model record. No key, no account, no rate-limited tier.

API documentation
Endpoint
GET https://modelbench.lol/api/v1/models/stepfun/step-3.5-flash
curl
curl "https://modelbench.lol/api/v1/models/stepfun/step-3.5-flash"
Common questions

Frequently asked questions

Answered directly from the stored record — nothing here is generated beyond the catalog's own fields.

What is Step 3.5 Flash?

StepFun flash lane for quick multimodal reasoning and coding assistance. It is published by StepFun and catalogued here from Models.dev.

How much does Step 3.5 Flash cost?

Listed input pricing starts at $0.09 per million tokens from Vercel AI Gateway, rising to $0.105 across 11 listed providers.

What is the context length of Step 3.5 Flash?

Step 3.5 Flash accepts up to 256K tokens of context and returns up to 256K output tokens.

Does Step 3.5 Flash support tool calling and structured output?

Provider catalogs list support for tool calling, and reasoning.

Which providers serve Step 3.5 Flash?

15 providers list this model: Qiniu, StepFun Step Plan (Global), Nvidia, StepFun Step Plan (China), Vercel AI Gateway, Eden AI and 9 more.

Are the weights for Step 3.5 Flash open?

Yes. The weights are published and downloadable from Hugging Face.

When was Step 3.5 Flash released?

The catalog records a release date of 2026-01-29, last verified Oct 24, 2026.

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