Compare AI models
| Specifications | ||
Context windowHow much text the model can hold in mind at once — your question, any documents you attach, the conversation so far, and its own reply. Go past it and the earliest part falls out of view. | 1M | — |
| Benchmarks | ||
Humanity's Last Exam · with toolsMultidisciplinary reasoning — Humanity's Last Exam — extremely hard expert questions across many subjects. “With tools” means the AI is allowed to search the web or run code while answering. Higher is better. | 64.5% | 35% |
BullshitBench v2Nonsense detection — Given a confidently-worded but nonsensical prompt, does the AI spot that it makes no sense and push back — instead of playing along and inventing an answer? The score is how often it clearly called out the nonsense. Higher is better. | — | 50% |
SWE-Bench VerifiedCoding — Real coding tasks pulled from open-source projects — the AI has to find and fix actual bugs. A human-checked version of the original SWE-Bench. Higher is better. | 95.5% | — |
Terminal-Bench 2.1Agentic terminal coding — Can the AI work in a command-line terminal — running commands and finishing technical setup tasks the way a developer would? Higher is better. | 88% | — |
Terminal-Bench 2.0Agentic terminal coding — Can the AI work in a command-line terminal — running commands and finishing technical setup tasks the way a developer would? (Version 2.0 of the test.) Higher is better. | 88% | — |
BrowseCompWeb browsing — Can the AI browse the web and track down hard-to-find answers? Higher is better. | 88% | — |
OSWorld-VerifiedAgentic computer use — Can the AI actually operate a computer — clicking, typing, and using real apps — to finish tasks on its own? Higher is better. | 85% | — |
| Overview | ||
| Company | Anthropic | SpaceXAI |
| Release date | Jun 9 2026 | Apr 17 2026 |
| Access | Closed | Closed |
| Model details | View model | View model |
Other comparisons
Claude Mythos 5vsGPT-6.1 SolGrok 4.3 BetavsGPT-6.1 SolClaude Mythos 5vsGemini 4 ArgonGrok 4.3 BetavsGemini 4 ArgonClaude Mythos 5vsMuse Spark 1.3Grok 4.3 BetavsMuse Spark 1.3Claude Mythos 5vsDeepSeek-V4.1-FlashGrok 4.3 BetavsDeepSeek-V4.1-FlashClaude Mythos 5vsMistral Large 4Grok 4.3 BetavsMistral Large 4Claude Mythos 5vsKimi K3Grok 4.3 BetavsKimi K3Frequently asked questions
Claude Mythos 5 leads Grok 4.3 Beta on 1 of the 1 benchmark they both report (Humanity's Last Exam). Grok 4.3 Beta shipped 53 days before Claude Mythos 5, so benchmark comparisons should account for the intervening progress.
Published specifications for these two models are limited — see each model page for the latest details.
On Humanity's Last Exam · with tools, Claude Mythos 5 leads at 64.5% vs Grok 4.3 Beta at 35%.