Claude Fable 5.1 vs Mistral Medium 3.5
API pricing, context window and capabilities for Claude Fable 5.1 and Mistral Medium 3.5, side by side. Prices are the cheapest listed serving route per 1M tokens, from LiteLLM and OpenRouter.
Verdict
computed from the published numbersClaude Fable 5.1 wins on Terminal-Bench, on intelligence and on context window. Mistral Medium 3.5 wins on price.
Price
Mistral Medium 3.5
Terminal-Bench
Claude Fable 5.1
Intelligence
Claude Fable 5.1
Context window
Claude Fable 5.1
Key takeaways
who wins on what, from the published numbersClaude Fable 5.1 wins
- Larger context window (1M vs 262K)
- More serving providers (7 vs 4)
- Supports prompt caching
- Has web search
Mistral Medium 3.5 wins
- Cheaper input ($10.00 vs $1.50 /1M)
- Cheaper output ($50.00 vs $7.50 /1M)
- Higher max output (128K vs 262K)
Cheaper overall
Mistral Medium 3.5
$1.50 + $7.50 /1M
Larger context
Claude Fable 5.1
1M
More providers
Claude Fable 5.1
7 providers
Pricing & specs
cheapest listed route · per 1M tokensOn-demand listed rates, OpenRouter routed quotes and Vercel reseller quotes. Enterprise commitments can be materially lower.
| Claude Fable 5.1 | Mistral Medium 3.5 | |
|---|---|---|
| Input $/1M | $10.00via Anthropic | $1.50via Mistral best |
| Output $/1M | $50.00via Anthropic | $7.50via Mistral best |
| Context window | 1M best | 262K |
| Max output | 128K | 262K best |
| Serving providers | 7 best | 4 |
| Date | Released Sep 1, 2026 | Released Apr 30, 2026 |
Benchmarks
Benchmark scores, side by side| Claude Fable 5.1 | Mistral Medium 3.5 | |
|---|---|---|
| Intelligence | 53.4 best | 14.2 |
| Terminal-Bench | 91% best | 51% |
| GPQA Diamond | 94% best | 75% |
| Output speed | 71 t/s | 167 t/s best |
| Latency (TTFT) | 249.68s | 2.21s best |
Cost calculator
choose a serving route for each sideInput tokens / month
Output tokens / month
Claude Fable 5.1
via Amazon Bedrock
$100
Mistral Medium 3.5
via OpenRouter
$15
Capabilities
feature support, side by side| Feature | Claude Fable 5.1 | Mistral Medium 3.5 |
|---|---|---|
| Vision | ✓ | ✓ |
| Tool use | ✓ | ✓ |
| Reasoning | ✓ | ✓ |
| Audio | — | — |
| Prompt caching | ✓ | — |
| Structured output | ✓ | ✓ |
| Web search | ✓ | — |
Related comparisons
Frequently asked questions
Which is cheaper, Claude Fable 5.1 or Mistral Medium 3.5?
Mistral Medium 3.5 is cheaper for input ($10.00 vs $1.50 per 1M tokens) from Mistral. Mistral Medium 3.5 is cheaper for output ($50.00 vs $7.50 per 1M tokens) from Mistral.
What is the context window difference between Claude Fable 5.1 and Mistral Medium 3.5?
Claude Fable 5.1 has a 1M-token context window and Mistral Medium 3.5 has 262K tokens, so Claude Fable 5.1 can take a larger prompt.
How do Claude Fable 5.1 and Mistral Medium 3.5 compare on benchmarks?
On the tracked benchmarks, Claude Fable 5.1 leads on Terminal-Bench, and Claude Fable 5.1 leads on intelligence.
Listed prices from LiteLLM, OpenRouter and Vercel · last checked Oct 14, 2026
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