Claude 1vsClaude Mythos 5
Claude 1 | Claude Mythos 5 | |
|---|---|---|
| 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. | 9k | 1M |
| BenchmarksPublished by one model only | ||
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 2.0Agentic 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% |
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% |
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 | Anthropic |
| Release date | Mar 14 2023 | Jun 9 2026 |
| Access | Proprietary | Proprietary |
Other comparisons
Claude 1vsGPT-6 AstraClaude Mythos 5vsGPT-6 AstraClaude 1vsGemini 3.8 FlashClaude Mythos 5vsGemini 3.8 FlashClaude 1vsMuse Spark 1.3Claude Mythos 5vsMuse Spark 1.3Claude 1vsGrok 4.6Claude Mythos 5vsGrok 4.6Claude 1vsDeepSeek-V4-Pro-0813Claude Mythos 5vsDeepSeek-V4-Pro-0813Claude 1vsMistral Medium 3.5Claude Mythos 5vsMistral Medium 3.5
Frequently asked questions
Claude 1 and Claude Mythos 5 don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Claude 1 shipped 1183 days before Claude Mythos 5, so benchmark comparisons should account for the intervening progress.
Context windows are 9k (Claude 1) vs 1M (Claude Mythos 5).
Direct benchmark comparisons are unavailable — Claude 1 and Claude Mythos 5 don't publish scores on any of the same benchmarks.