2 models
Ranked by Terminal-Bench 4.0
Reasoning Tools JSON 66.4

Claude model for long-running agentic coding and knowledge work

anthropic/claude-opus-5-5 2026-09-22 1M context $4/M input $20/M output
35 providers
Reasoning Tools JSON 55.8

Claude model for demanding reasoning and long-horizon agentic work

anthropic/claude-fable-5-1 2026-09-01 1M context $10/M input $50/M output
36 providers