Claude Mythos 5 vs Claude Fable 5
Side-by-side comparison of API pricing, specs, benchmarks, and capabilities
| Specification |
by Anthropic
|
by Anthropic
|
|---|---|---|
| Overview | ||
| Status | Current flagship | Current flagship |
| Released | Jun 9, 2026 | Jun 9, 2026 |
| Pricing per million tokens | ||
| Input | $10.00/Mtok | $10.00/Mtok |
| Output | $50.00/Mtok | $50.00/Mtok |
| Blended avg | $20.00/Mtok | $20.00/Mtok |
| Cached input | $1.00/Mtok | $1.00/Mtok |
| Specifications | ||
| Context window | 1M tokens | 1M tokens |
| Parameters | Proprietary | Proprietary |
| Speed (TPS) | — | — |
| Modalities | ||
| Input |
textimage
|
textimage
|
| Benchmarks source: Vellum LLM Leaderboard | ||
| Avg benchmark score | 87.5 | 89.2 |
| Perf / dollar | 4.4 | 4.5 |
| GPQA Diamond | 94.1 | 94.1 |
| SWE-Bench Verified | 95.5 | 95 |
| Terminal-Bench 2.1 | 88 | 84.3 |
| HumanEval | 95.5 | 95 |
| MCP Atlas | — | 83.3 |
| BrowseComp | — | 88 |
| OSWorld-Verified | — | 85 |
| Humanity's Last Exam | 64.5 | — |
| AutoBench | — | 17.4 |
| Independent composite scores each on its own scale — not part of the average above | ||
| AA Intelligence Index | — | 62.1 |
| AA Agentic Index | — | 56.6 |
| AA-Omniscience Index (−100–100) | — | 43.3 |
| GDPval-AA v2 | — | 1723 ELO |
| LMSYS Chatbot Arena | — | 1507.5 ELO |
| Providers | ||
| Available from |
Anthropic — $10.00/$50.00/Mtok
|
Anthropic — $10.00/$50.00/Mtok
|
Cost at scale
1M tokens · 50/50 input/output| Volume | Claude Mythos 5 | Claude Fable 5 | Savings |
|---|---|---|---|
| 1M tokens | $20 | $20 | $0 (0%) |
| 10M tokens | $200 | $200 | $0 (0%) |
| 100M tokens | $2000 | $2000 | $0 (0%) |
| 1000M tokens | $20000 | $20000 | $0 (0%) |
When to pick which
distilled from the pricing and spec data above- this pairing gives Claude Mythos 5 no edge on price, context, cache discount, or measured performance — pick it only for qualitative fit (ecosystem, compliance, model behavior on your prompts)
- raw capability matters more than price: 89.2 vs 87.5 average benchmark score
The cheaper option here — Claude Mythos 5 costs $20.00/Mtok blended on Anthropic.
Summary
Claude Mythos 5 by Anthropic costs $10.00/Mtok input and $50.00/Mtok output, with a 1M-token context window. It supports text, image input.
Claude Fable 5 by Anthropic costs $10.00/Mtok input and $50.00/Mtok output, with a 1M-token context window. It supports text, image input.
On benchmarks, Claude Fable 5 scores higher (89.2 vs 87.5) on average. In terms of value, Claude Fable 5 has better performance per dollar (4.5 vs 4.4).
Note: Pricing is per million tokens. Actual costs vary with usage patterns, prompt caching, and batch discounts. Always verify against official provider pricing pages.