Update surface
This is the weekly-extensible surface required for the Claude benchmark network. Future updates should add new model launches, benchmark revisions, score changes, and methodology corrections here.
2026-07-06
Created the source-first benchmark desk around current Claude Fable 5, Opus 4.8, Sonnet 5, GPT-5.5, GPT-5.6 preview, SWE-Bench Pro, SWE-Bench Verified, and Terminal-Bench 2.0 sources.
Primary source: Anthropic Claude Platform Docs2026-06-30
Anthropic introduced Sonnet 5 with lower-cost agentic positioning and introductory pricing through August 31, 2026.
Primary source: Anthropic2026-06-26
OpenAI previewed GPT-5.6 Sol, Terra, and Luna. The Help Center states ChatGPT is not included during preview.
Primary source: OpenAI Help Center2026-05-28
Anthropic released Opus 4.8 with effort control, fast mode, 1M context, and agentic coding positioning.
Primary source: Anthropic