Claude Fable 5.1 vs Mistral Medium 3.5

Price, context window & benchmark comparison

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Claude Fable 5.1

Anthropic
$10.00 / $50.00
Input / Output · per 1M tokens
VS
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Mistral Medium 3.5

Mistral AI
$1.50 / $7.50
Input / Output · per 1M tokens
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Verdict: Mistral Medium 3.5 is 6.7× cheaper than Claude Fable 5.1 on a typical 3:1 input/output mix. Claude Fable 5.1 scores higher on the Artificial Analysis Intelligence Index (53.4 vs 14.2). Claude Fable 5.1 has the larger context window (1M vs 262K).
Claude Fable 5.1Mistral Medium 3.5
Input price / 1M$10.00$1.50
Output price / 1M$50.00$7.50
Blended price (3:1)$20.00$3.00
Cached input / 1M$0.25
Context window1M262K
Max output128K210K
Intelligence index53.414.2
Coding index81.646.9
Providers42
Best provider uptime (30m)100.0%100.0%
Vision inputYesYes
ReasoningYesYes
Tool callingYesYes
Released2026-09-012026-04-30
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FAQ

Which is cheaper, Claude Fable 5.1 or Mistral Medium 3.5?

Mistral Medium 3.5 is 6.7× cheaper than Claude Fable 5.1 on a typical 3:1 input/output mix.

Claude Fable 5.1 vs Mistral Medium 3.5: which has a bigger context window?

Claude Fable 5.1: 1,000,000 tokens. Mistral Medium 3.5: 262,144 tokens.

How much would 1 million requests cost?

At 2,000 input + 500 output tokens per request: Claude Fable 5.1 ≈ $45,000, Mistral Medium 3.5 ≈ $6,750.

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