Claude Mythos 5.1vsGrok 4.7
Claude Mythos 5.1 | Grok 4.7 | |
|---|---|---|
| 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 | 500k |
| API pricingUSD per 1M tokens · lower wins · base tier | ||
Input priceWhat you pay for everything you send the model — your question, plus any documents or earlier conversation you include with it. | — | $2.00 |
Output priceWhat you pay for the text the model writes back. It is normally the dearer half: producing an answer costs more than reading one. | — | $6.00 |
Cached input priceA reduced rate for text you send over and over. If every request starts with the same instructions or the same document, the provider keeps a copy ready and charges less to read it again. | — | $0.50 |
| Benchmarks | ||
Terminal-Bench 4.0Agentic terminal coding — Can the AI work in a command-line terminal — running commands and finishing technical setup tasks the way a developer would? Version 4.0 recalibrated how much time, CPU and memory each task gets, removed eight tasks and fixed nineteen, so fewer runs fail for reasons that have nothing to do with the model. Scores are not comparable with earlier versions. Higher is better. | 60.9% | 38% |
| BenchmarksPublished by one model only | ||
DeepSWE 1.1Agentic coding — Artificial Analysis' independent test of deep, agentic software-engineering work — the AI has to plan and carry out substantial coding tasks end to end. (Version 1.1 of the test.) Higher is better. | — | 71% |
EEBenchElectrical engineering — Electrical-engineering problems — the circuit and systems work an engineer would be handed. Reported in xAI's Grok 4.7 launch comparison, which does not say who publishes the test. Higher is better. | — | 64% |
Harvey's Legal Agent BenchmarkAgentic legal work — Harvey's test of whether an AI agent can complete real legal work — drafting and reviewing documents, working with spreadsheets and presentations, and navigating files the way a lawyer's assistant would. Higher is better. | — | 19.6% |
HealthBench ProfessionalHealth — Realistic health conversations graded against detailed rubrics written by physicians — can the AI respond the way a careful medical professional would? Higher is better. | — | 56.7% |
GDPval-AA v2.1Knowledge work — economically valuable knowledge work (v2.1, Crowd-BT Elo fit) | — | 1695 |
AA-Briefcase v1.1Knowledge work — Artificial Analysis agentic office-work eval (Elo, v1.1 rating fit) | — | 1657 |
| Overview | ||
| Company | Anthropic | SpaceXAI |
| Release date | Sep 1 2026 | Sep 21 2026 |
| Access | Proprietary | Proprietary |
Other comparisons
Claude Mythos 5.1vsGPT-6 AstraGrok 4.7vsGPT-6 AstraClaude Mythos 5.1vsGemini 3.8 FlashGrok 4.7vsGemini 3.8 FlashClaude Mythos 5.1vsMuse Spark 1.3Grok 4.7vsMuse Spark 1.3Claude Mythos 5.1vsDeepSeek-V4.1-FlashGrok 4.7vsDeepSeek-V4.1-FlashClaude Mythos 5.1vsMistral Medium 3.5Grok 4.7vsMistral Medium 3.5Claude Mythos 5.1vsKimi K3Grok 4.7vsKimi K3
Frequently asked questions
Claude Mythos 5.1 leads Grok 4.7 on 1 of the 1 benchmark they both report (Terminal-Bench 4.0). Only Grok 4.7 has a verified first-party API price: $2.00 per million input tokens and $6.00 per million output tokens. No pay-as-you-go API rate is tracked for Claude Mythos 5.1. Claude Mythos 5.1 shipped 20 days before Grok 4.7, so benchmark comparisons should account for the intervening progress.
Context windows are 1M (Claude Mythos 5.1) vs 500k (Grok 4.7).
On Terminal-Bench 4.0, Claude Mythos 5.1 leads at 60.9% vs Grok 4.7 at 38%.