Anthropic
United States · anthropic.comAnthropic has 15 models in the CorX Labs benchmark index, none of them with open weights. Below: context window, price per million tokens, licence and published benchmark scores for each.
| Claude Fable 5.1Anthropic | Anthropic | 1M | $10.00 | $50.00 | — | — | — | — | Proprietary |
| Claude Mythos 5.1Anthropic | Anthropic | 1M | $10.00 | $50.00 | — | — | — | — | Proprietary |
| Claude Opus 5Anthropic | Anthropic | 1M | $5.00 | $25.00 | — | — | — | — | Proprietary |
| Claude Sonnet 5Anthropic | Anthropic | 1M | $2.00 | $10.00 | — | — | — | — | Proprietary |
| Claude Fable 5Anthropic | Anthropic | 1M | $10.00 | $50.00 | — | — | — | — | Proprietary |
| Claude Mythos 5Anthropic | Anthropic | 1M | $10.00 | $50.00 | — | — | — | — | Proprietary |
| Claude Opus 4.5Anthropic | Anthropic | 200K | $5.00 | $25.00 | — | 87% | 96% | 80.9% | Proprietary |
| Claude Haiku 4.5Anthropic | Anthropic | 200K | $1.00 | $5.00 | — | 73% | 77% | 73.3% | Proprietary |
| Claude Sonnet 4.5Anthropic | Anthropic | 1M | $3.00 | $15.00 | — | 83.4% | 87% | 77.2% | Proprietary |
| Claude Opus 4.1Anthropic | Anthropic | 200K | $15.00 | $75.00 | — | 80.9% | 78% | 74.5% | Proprietary |
| Claude Sonnet 4Anthropic | Anthropic | 200K | $3.00 | $15.00 | — | 75.4% | 70.5% | 72.7% | Proprietary |
| Claude 3.7 SonnetAnthropic | Anthropic | 200K | $3.00 | $15.00 | — | 68% | 61.3% | 62.3% | Proprietary |
| Claude 3.5 HaikuAnthropic | Anthropic | 200K | $0.80 | $4.00 | 65% | 41.6% | — | 40.6% | Proprietary |
| Claude 3.5 SonnetAnthropic | Anthropic | 200K | $3.00 | $15.00 | 78% | 65% | — | 49% | Proprietary |
| Claude 3 OpusAnthropic | Anthropic | 200K | $15.00 | $75.00 | 68.5% | 50.4% | — | — | Proprietary |
Where these numbers come from
Every score on this page is a published figure, taken from the model's own card, system card, technical report or release post, or from a public leaderboard. CorX Labs did not run these evaluations. Most are self-reported by the lab that built the model, which means they were produced under that lab's own choice of prompt, scaffold and number of attempts — so treat them as a starting point for a shortlist, not as a settled ranking.
A score someone other than the model's maker measured is marked Independent and names its measurer. Those are the stronger numbers on this page — an outside harness has no reason to flatter anyone — and there are not many of them.
Where a figure has not been published, the cell reads Not reported rather than an estimate. Nothing here is inferred, interpolated or guessed. Each model records the month its row was last checked. Full method and caveats.