Claude Haiku 5.5 vs Claude Mythos 5.2 Fast
Price, context window & benchmark comparison
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Verdict: Claude Haiku 5.5 has the larger context window (1M vs —).
| Claude Haiku 5.5 | Claude Mythos 5.2 Fast | |
|---|---|---|
| Input price / 1M | $0.10 | — |
| Output price / 1M | $0.50 | — |
| Blended price (3:1) | $0.20 | — |
| Cached input / 1M | $0.01 | — |
| Context window | 1M | — |
| Max output | 128K | — |
| Intelligence index | 36.5 | — |
| Coding index | — | — |
| Providers | 10 | — |
| Best provider uptime (30m) | 100.0% | — |
| Vision input | Yes | No |
| Reasoning | Yes | No |
| Tool calling | Yes | No |
| Released | 2026-10-07 | 2026-11-09 |
| Retirement | — | — |
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FAQ
Which is cheaper, Claude Haiku 5.5 or Claude Mythos 5.2 Fast?
Claude Haiku 5.5 and Claude Mythos 5.2 Fast are priced identically.
Claude Haiku 5.5 vs Claude Mythos 5.2 Fast: which has a bigger context window?
Claude Haiku 5.5: 1,000,000 tokens. Claude Mythos 5.2 Fast: — tokens.
How much would 1 million requests cost?
At 2,000 input + 500 output tokens per request: Claude Haiku 5.5 ≈ $450.00, Claude Mythos 5.2 Fast ≈ $0.
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