Claude Mythos 5vsGPT-6 Luna
Claude Mythos 5 | GPT-6 Luna | |
|---|---|---|
| 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 | 1.05M |
| 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. | — | $0.10 |
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. | — | $0.50 |
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. | — | $0.01 |
| 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% | — |
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. | — | 66.6% |
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 | OpenAI |
| Release date | Jun 9 2026 | Sep 22 2026 |
| Access | Proprietary | Proprietary |
Other comparisons
Claude Mythos 5vsGemini 3.8 FlashGPT-6 LunavsGemini 3.8 FlashClaude Mythos 5vsMuse Spark 1.3GPT-6 LunavsMuse Spark 1.3Claude Mythos 5vsGrok 4.7GPT-6 LunavsGrok 4.7Claude Mythos 5vsDeepSeek-V4.1-FlashGPT-6 LunavsDeepSeek-V4.1-FlashClaude Mythos 5vsMistral Medium 3.5GPT-6 LunavsMistral Medium 3.5Claude Mythos 5vsKimi K3GPT-6 LunavsKimi K3
Frequently asked questions
Claude Mythos 5 and GPT-6 Luna don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Only GPT-6 Luna has a verified first-party API price: $0.10 per million input tokens and $0.50 per million output tokens. No pay-as-you-go API rate is tracked for Claude Mythos 5. Claude Mythos 5 shipped 105 days before GPT-6 Luna, so benchmark comparisons should account for the intervening progress.
Context windows are 1M (Claude Mythos 5) vs 1.05M (GPT-6 Luna).
Direct benchmark comparisons are unavailable — Claude Mythos 5 and GPT-6 Luna don't publish scores on any of the same benchmarks.