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Claude Mythos 5.2 API pricing

Official Anthropic list price, last checked Nov 9, 2026. Updated Nov 9, 2026.

Claude Fable 5.2 and Mythos 5.2 launched Nov 9, 2026. Read Claude Fable 5.2 and Mythos 5.2: prices, limits and what changed.

Quick answer

Claude Mythos 5.2 costs $8 per 1M input tokens and $40 per 1M output tokens, cached input at $0.20, and a 1M-token context window, per Anthropic's official pricing page (checked Nov 9, 2026). It's a premium-priced model: number 77 of 79 by blended price ($16 per 1M tokens at a 3 to 1 input to output mix). LMArena doesn't list it on the boards we track, so we don't rank its quality. For less, look at GPT-5.6 Sol ($8 blended).

Claude Mythos 5.2 price per million tokens

Claude Mythos 5.2 price per million tokensUSD
Input$8
Cached input$0.20
Output$40
Blended, 3 parts input to 1 part output$16
Context window1M tokens

Official note from Anthropic: Verified organizations only (Cyber and Life Sciences Verification Programs). Same price as Fable 5.2 per Anthropic. Released Nov 9, 2026.

What Claude Mythos 5.2 costs for real work

List-price estimates for a month, no discounts. Our math, not a quote: change the token counts in the plan vs API calculator.

WorkloadTokens a monthClaude Mythos 5.2GPT-6 AstraGPT-5.6 Sol
Light: a side project or personal assistant2M in, 0.5M out$36.00$45.00$18.00
Medium: a small team or one product feature20M in, 5M out$360$450$180
Heavy: a production app200M in, 50M out$3,600$4,500$1,800
Medium with 80% of input cached20M in (16M cached), 5M out$235$306$122

How Claude Mythos 5.2 ranks on LMArena

It isn't on any LMArena board we track as of Nov 9, 2026. We don't estimate quality for unranked models. See the best model for each task for ranked options.

Closest rivals to Claude Mythos 5.2

The models nearest in price, other makers first. Ranks are on LMArena, where we have them.

ModelIn / outBlendedRankVerdict
GPT-6 Astra OpenAI$10 / $50$20n/aClaude Mythos 5.2 wins on price. Compare
Claude Fable 5.2 Anthropic$8 / $40$16n/aSame price, no score to separate them. Compare
GPT-5.5 OpenAI$5 / $30$11.25n/aGPT-5.5 wins on price. Compare
GPT-5.6 Sol OpenAI$4 / $20$8n/aGPT-5.6 Sol wins on price. Compare

Cheaper alternatives to Claude Mythos 5.2

At least 40% cheaper blended, cheapest at the bottom of the list we found.

ModelIn / outBlendedRankVerdict
GPT-5.6 Sol OpenAI$4 / $20$8n/aGPT-5.6 Sol wins on price. Compare
Claude Opus 5.5 Anthropic$4 / $20$8n/aClaude Opus 5.5 wins on price. Compare
Muse Wonder 1.0 Meta$4 / $20$8n/aMuse Wonder 1.0 wins on price. Compare

More from Anthropic

FAQ

How much does the Claude Mythos 5.2 API cost per million tokens?

$8 per 1M input tokens and $40 per 1M output tokens, plus $0.20 per 1M for cached input, as of Nov 9, 2026. A typical 3 to 1 input to output mix works out to $16 per 1M tokens.

Does Claude Mythos 5.2 charge more for long prompts?

Anthropic doesn't list a long-prompt surcharge for Claude Mythos 5.2. Its pricing note says: Verified organizations only (Cyber and Life Sciences Verification Programs). Same price as Fable 5.2 per Anthropic. Released Nov 9, 2026.

Is Claude Mythos 5.2 cheaper than GPT-6 Astra?

Yes. A medium month (20M input and 5M output tokens) costs $360 on Claude Mythos 5.2 and $450 on GPT-6 Astra at list price.

How does Claude Mythos 5.2 rank on LMArena?

It isn't listed on the LMArena boards we track, so we show no quality rank rather than guess.

What is a cheaper alternative to Claude Mythos 5.2?

GPT-5.6 Sol costs $4 in and $20 out per 1M tokens, about 2.0x less blended.

Where does this Claude Mythos 5.2 price come from?

From Anthropic's official pricing page, which we check every day. This page was last checked Nov 9, 2026.

Sources

Related

Fable 5.2 coverage