Anthropic
claude-opus-4-8
Made by Anthropic. Released 2026-05-28. Accessibility not recorded. We hold no price for this model: no seller we can read lists it any more, so what follows is what was measured, not what it cost.
What it scores, by house
| Benchmark | House | Score | Evaluated | Scaffold |
|---|---|---|---|---|
| chess puzzles | Epoch AI | 0.3±0.05 | 2026-08-06 | low |
| chess puzzles | Epoch AI | 0.1±0.03 | 2026-08-06 | none |
| chess puzzles | Epoch AI | 0.3±0.05 | 2026-05-29 | max |
| ebr bench | Epoch AI | 0.3±0.01 | 2026-08-07 | max |
| frontiermath | Epoch AI | 0.5±0.03 | 2026-06-08 | max |
| frontiermath tier 4 | Epoch AI | 0.3±0.07 | 2026-06-08 | max |
| frontiermath tier 4 v2 | Epoch AI | 0.6±0.08 | 2026-06-10 | max |
| frontiermath tiers 1 3 v2 | Epoch AI | 0.8±0.02 | 2026-06-10 | max |
| gpqa diamond | Epoch AI | 0.9±0.02 | 2026-08-06 | low |
| gpqa diamond | Epoch AI | 0.9±0.03 | 2026-08-06 | none |
| gpqa diamond | Epoch AI | 0.9±0.02 | 2026-06-07 | max |
| mystery game puzzles | Epoch AI | 0.3±0.05 | 2026-07-26 | xhigh |
| mystery game puzzles | Epoch AI | 0.4±0.05 | 2026-07-25 | max |
| otis mock aime 2024 2025near its ceiling | Epoch AI | 1.0±0.02 | 2026-08-06 | low |
| otis mock aime 2024 2025near its ceiling | Epoch AI | 0.8±0.05 | 2026-08-06 | none |
| otis mock aime 2024 2025near its ceiling | Epoch AI | 1.0±0.01 | 2026-06-07 | max |
| simpleqa verified | Epoch AI | 0.5±0.02 | 2026-08-27 | max |
| ale bench | collected by Epoch AI | 1564 | — | high |
| ale bench | collected by Epoch AI | 1412 | — | none |
| apex agents | collected by Epoch AI | 0.6 | — | max |
| arc aginear its ceiling | collected by Epoch AI | 0.9 | — | max |
| arc aginear its ceiling | collected by Epoch AI | 0.9 | — | medium |
| arc aginear its ceiling | collected by Epoch AI | 0.9 | — | high |
| arc aginear its ceiling | collected by Epoch AI | 0.9 | — | low |
| arc agi 2 | collected by Epoch AI | 0.7 | — | high |
| arc agi 2 | collected by Epoch AI | 0.7 | — | medium |
| arc agi 2 | collected by Epoch AI | 0.6 | — | low |
| blueprint bench 2 | collected by Epoch AI | 0.1 | — | unknown |
| btf3 | collected by Epoch AI | 0.1 | — | FutureSearch agent |
| btf3 | collected by Epoch AI | 0.1 | — | Vendor agent SDK |
| critpt | collected by Epoch AI | 0.2 | — | max |
| cursorbench | collected by Epoch AI | 0.5 | — | low |
| cursorbench | collected by Epoch AI | 0.6 | — | max |
| cursorbench | collected by Epoch AI | 0.6 | — | xhigh |
| cursorbench | collected by Epoch AI | 0.6 | — | high |
| cursorbench | collected by Epoch AI | 0.6 | — | medium |
| deepresearchbench | collected by Epoch AI | 0.5 | — | high |
| deepresearchbench | collected by Epoch AI | 0.5 | — | low |
| deepresearchbench | collected by Epoch AI | 0.5 | — | medium |
| deepswe | collected by Epoch AI | 0.6 | — | mini-swe-agent |
| dtbenchnear its ceiling | collected by Epoch AI | 0.9 | — | max |
| enigma eval | collected by Epoch AI | 0.2 | — | xhigh |
| forecastbench | collected by Epoch AI | 58.5 | — | unknown |
| forecastbench | collected by Epoch AI | 59.3 | — | 24K |
| frontiercode | collected by Epoch AI | 0.5 | — | claude-code |
| gbaeval | collected by Epoch AI | 0.7 | — | unknown |
| gdp pdf | collected by Epoch AI | 0.2 | — | max |
| gso | collected by Epoch AI | 0.5 | — | OpenHands |
| lmca | collected by Epoch AI | 57.5 | — | max |
| osworld 2 | collected by Epoch AI | 0.2 | — | max |
| posttrainbench | collected by Epoch AI | 0.3 | — | Claude Code |
| proofbench | collected by Epoch AI | 0.7 | — | max |
| rli | collected by Epoch AI | 0.1 | — | unknown |
| scicode | collected by Epoch AI | 0.5 | — | max |
| simplebench | collected by Epoch AI | 0.6 | — | unknown |
| surface evolver bench | collected by Epoch AI | 0.9 | — | high |
| surface evolver bench | collected by Epoch AI | 0.7 | — | none |
| vending bench 2 | collected by Epoch AI | 2992 | — | max |
| vending bench 2 | collected by Epoch AI | 5787 | — | unknown |
| webdev arena | collected by Epoch AI | 1552 | — | unknown |
| webdev arena | collected by Epoch AI | 1563 | — | high |
| webdev arena | collected by Epoch AI | 1539 | — | none |
| weirdml | collected by Epoch AI | 0.7 | — | none |
| weirdml | collected by Epoch AI | 0.8 | — | xhigh |
| weirdml | collected by Epoch AI | 0.8 | — | medium |
These scores are not comparable between houses and are not added up. A score is dated by when it was evaluated, not when the model was released, and a score without its scaffold is not a measurement — which is why both are printed.
What retires, and when
- deprecation — 2027-05-28 (Active)