Step 3.7 Flash pricing, providers and specs

Capabilities

What this model supports

ReasoningYes

Tool callingYes

Structured outputNo

AttachmentsYes

Temperature controlYes

Open weightsYes

Creator: StepFun
Family: Not documented
Modalities: Image, Text
License: Not documented
Release date: 2026-05-29
Model ID: stepfun/step-3.7-flash

Market availability

Provider pricing

Report price →

Providers offering Step 3.7 Flash
Provider	Provider model ID	Context	Input / 1M	Output / 1M	Cached / 1M	Features	All pricing
UnoRouter	`step-3.7-flash:free`	256K	$0.000	$0.000	—	R T ·	View { "input": 0, "output": 0 }
Nvidia	`stepfun-ai/step-3.7-flash`	256K	$0.000	$0.000	—	R T ·	View { "input": 0, "output": 0 }
Hugging Face	`stepfun-ai/Step-3.7-Flash`	262.144K	$0.200	$1.150	—	R T ·	View { "input": 0.2, "output": 1.15 }
StepFun AI	`step-3.7-flash`	256K	$0.200	$1.150	$0.040	R T ·	View { "cache_read": 0.04, "input": 0.2, "output": 1.15 }
StepFun	`step-3.7-flash`	256K	$0.200	$1.150	$0.040	R T ·	View { "cache_read": 0.04, "input": 0.2, "output": 1.15 }
OpenRouter	`stepfun/step-3.7-flash`	256K	$0.200	$1.150	$0.040	R T S	View { "cache_read": 0.04, "input": 0.2, "output": 1.15 }
Vercel AI Gateway	`stepfun/step-3.7-flash`	256K	$0.200	$1.150	$0.040	R T ·	View { "cache_read": 0.04, "input": 0.2, "output": 1.15 }
EmpirioLabs AI	`step-3-7-flash`	256K	$0.200	$1.150	$0.040	R T S	View { "cache_read": 0.04, "input": 0.2, "output": 1.15 }
ZenMux	`stepfun/step-3.7-flash`	256K	$0.200	$1.150	—	R T ·	View { "input": 0.2, "output": 1.15 }

Evidence

Published benchmark results

Agentic Index vs top 8 models

GPT-5.6 Sol

54.0

Claude Fable 5

52.8

GPT-5.6 Terra

47.4

Anthropic: Claude Opus 4.8

47.2

Claude Sonnet 5

46.7

xAI: Grok 4.5

45.7

GPT-5.6 Luna

45.6

Step 3.7 Flash

21.5

BrowseComp vs top 8 models

GPT-5.6 Sol

90.4

GPT-5.5 Pro

90.1

GPT-5.4 Pro

89.3

GPT-5.6 Terra

87.5

Claude Sonnet 5

84.7

GPT-5.5

84.4

MiniMax-M3

83.5

Step 3.7 Flash

75.8

ClawEval vs top 1 models

Step 3.7 Flash

67.1

Coding Index vs top 8 models

GPT-5.6 Sol

77.4

GPT-5.6 Terra

76.7

Claude Fable 5

76.5

GPT-5.5

74.9

Anthropic: Claude Opus 4.8

74.3

Anthropic: Claude Opus 4.7

73.6

xAI: Grok 4.5

72.4

Step 3.7 Flash

39.6

Design Arena: 3d vs top 8 models

Z.ai: GLM 5.2

1371.0

Claude Fable 5

1361.0

xAI: Grok 4.5

1352.0

Anthropic: Claude Opus 4.6

1348.0

Kimi K2.6

1348.0

Z.ai: GLM 5.1

1336.0

DeepSeek V4 Pro

1326.0

Step 3.7 Flash

1192.0

Design Arena: asciiart vs top 8 models

Claude Fable 5

1369.0

Anthropic: Claude Opus 4.7

1326.0

Gemini 3.1 Pro Preview

1316.0

Gemini 3.5 Flash

1308.0

Anthropic: Claude Opus 4.6

1305.0

Anthropic: Claude Opus 4.8

1305.0

GPT-5.5

1302.0

Step 3.7 Flash

1212.0

Design Arena: codecategories vs top 8 models

Z.ai: GLM 5.2

1352.0

Claude Fable 5

1344.0

Anthropic: Claude Opus 4.6

1336.0

Anthropic: Claude Opus 4.7

1330.0

xAI: Grok 4.5

1328.0

Z.ai: GLM 5.1

1321.0

Kimi K2.6

1320.0

Step 3.7 Flash

1210.0

Design Arena: dataviz vs top 8 models

Claude Fable 5

1372.0

Z.ai: GLM 5.1

1366.0

xAI: Grok 4.5

1330.0

Anthropic: Claude Opus 4.6

1321.0

Anthropic: Claude Opus 4.7

1320.0

Z.ai: GLM 5.2

1318.0

Anthropic: Claude Sonnet 4.6

1317.0

Step 3.7 Flash

1205.0

Design Arena: gamedev vs top 8 models

Claude Fable 5

1387.0

Z.ai: GLM 5.2

1354.0

Claude Sonnet 5

1345.0

GPT-5.5

1344.0

Anthropic: Claude Opus 4.6

1339.0

MiMo-V2.5-Pro

1334.0

Anthropic: Claude Opus 4.7

1334.0

Step 3.7 Flash

1201.0

Design Arena: svg vs top 8 models

Claude Fable 5

1364.0

Gemini 3.1 Pro Preview

1340.0

Gemini 3.5 Flash

1297.0

Anthropic: Claude Opus 4.6

1279.0

GPT-5.5

1277.0

Anthropic: Claude Opus 4.7

1274.0

Z.ai: GLM 5.1

1273.0

Step 3.7 Flash

1119.0

Design Arena: uicomponent vs top 8 models

Claude Fable 5

1406.0

Anthropic: Claude Opus 4.7

1358.0

Anthropic: Claude Opus 4.6

1344.0

Z.ai: GLM 5.2

1336.0

Qwen: Qwen3.7 Max

1331.0

Z.ai: GLM 5.1

1330.0

Anthropic: Claude Sonnet 4.6

1321.0

Step 3.7 Flash

1208.0

Design Arena: website vs top 8 models

Z.ai: GLM 5.2

1346.0

Claude Fable 5

1336.0

Anthropic: Claude Opus 4.6

1331.0

Anthropic: Claude Opus 4.7

1329.0

xAI: Grok 4.5

1323.0

Anthropic: Claude Sonnet 4.6

1320.0

Claude Sonnet 5

1314.0

Step 3.7 Flash

1219.0

GDPval vs top 6 models

GPT-5.5

84.9

GPT-5.4

83.0

GPT-5.5 Pro

82.3

GPT-5.4 Pro

82.0

Nemotron 3 Ultra 550B A55B

46.7

Step 3.7 Flash

45.8

Humanity's Last Exam vs top 8 models

Claude Fable 5

64.5

Muse Spark 1.1

62.1

GPT-5.4 Pro

58.7

Claude Opus 4.8

57.9

GPT-5.5 Pro

57.2

Claude Opus 4.7

54.7

GPT-5.5

52.2

Step 3.7 Flash

47.2

Intelligence Index vs top 8 models

Claude Fable 5

59.9

GPT-5.6 Sol

58.9

Anthropic: Claude Opus 4.8

55.7

GPT-5.6 Terra

55.0

GPT-5.5

54.8

xAI: Grok 4.5

53.8

Anthropic: Claude Opus 4.7

53.5

Step 3.7 Flash

30.3

SWE-Bench Pro vs top 8 models

Claude Fable 5

80.3

Claude Opus 4.8

69.2

Grok 4.5

64.7

GPT-5.6 Sol

64.6

Claude Opus 4.7

64.3

GPT-5.6 Terra

63.4

Claude Sonnet 5

63.2

Step 3.7 Flash

56.3

SWE-Bench Verified vs top 8 models

Claude Fable 5

95.0

Claude Opus 4.8

88.6

Claude Sonnet 5

85.2

Ornith 1.0 397B

82.4

DeepSeek V4 Pro

80.6

Qwen3.7 Max

80.4

Kimi K2.6

80.2

Step 3.7 Flash

76.5

Terminal-Bench vs top 8 models

GPT-5.6 Sol

88.8

Claude Fable 5

88.0

GPT-5.6 Terra

87.4

GPT-5.6 Luna

84.7

Grok 4.5

83.3

GPT-5.5

82.7

Muse Spark 1.1

80.0

Step 3.7 Flash

59.6

Toolathlon vs top 6 models

GPT-5.6 Sol

58.0

Gemini 3.5 Flash

56.5

GPT-5.5

55.6

GPT-5.6 Luna

53.4

GPT-5.6 Terra

53.1

Step 3.7 Flash

49.5