Anthropic internal Blueprint-Bench v2 — Anthropic-only sourcing (Fable5/Mythos5); versioned internal eval, no public reference found
| # | Model | Vendor | Best score | Runs | Last seen |
|---|---|---|---|---|---|
| 1 | Claude Fable 5 | Anthropic | 38.6 | 3 | 2026-08-23 |
| 2 | Gemini 3.5 Flash | 33.6 | 4 | 2026-08-24 | |
| 3 | Gemini 3.1 Pro | 26.5 | 2 | 2026-07-06 | |
| 4 | Claude Opus 4.7 | Anthropic | 24.5 | 2 | 2026-07-06 |
| 5 | Claude Mythos 5 | Anthropic | 14.5 | 1 | 2026-06-12 |
| 6 | Claude Sonnet 4.6 | Anthropic | 6.7 | 1 | 2026-07-06 |
| 7 | Gemini 3 Flash Preview | 0 | 1 | 2026-07-06 |
Best tracked score per model (default configuration; source-attributed and verification-tiered). Open a model for its full benchmark surface, provenance and pricing.