2 models
Ranked by SWE-Atlas Test Writing
Reasoning Tools JSON 36.7

High-end Claude for difficult coding, planning, and slower expert reasoning

anthropic/claude-opus-4-6 2026-02-05 1M context $5/M input $25/M output
40 providers
Reasoning Tools JSON 31.8

Claude workhorse for coding agents, careful analysis, and production cost control

anthropic/claude-sonnet-4-6 2026-02-17 1M context $3/M input $15/M output
49 providers