Claude Fable 5.1 vs GPT-5.6 Sol
API pricing, context window and capabilities for Claude Fable 5.1 and GPT-5.6 Sol, 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 and on intelligence. GPT-5.6 Sol wins on price and on context window.
Price
GPT-5.6 Sol
Terminal-Bench
Claude Fable 5.1
Intelligence
Claude Fable 5.1
Context window
GPT-5.6 Sol
Key takeaways
who wins on what, from the published numbersClaude Fable 5.1 wins
- More serving providers (7 vs 6)
GPT-5.6 Sol wins
- Cheaper input ($10.00 vs $2.00 /1M)
- Cheaper output ($50.00 vs $10.00 /1M)
- Larger context window (1M vs 1.1M)
Cheaper overall
GPT-5.6 Sol
$2.00 + $10.00 /1M
Larger context
GPT-5.6 Sol
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. An OpenRouter routed quote is the price of whichever upstream provider OpenRouter prefers today, so it moves day to day.
| Claude Fable 5.1 | GPT-5.6 Sol | |
|---|---|---|
| Input $/1M | $10.00via Anthropic | $2.00OpenRouter routed quote best |
| Output $/1M | $50.00via Anthropic | $10.00OpenRouter routed quote best |
| Context window | 1M | 1.1M best |
| Max output | 128K | 128K |
| Serving providers | 7 best | 6 |
| Date | Released Sep 1, 2026 | Released Jul 9, 2026 |
Benchmarks
Benchmark scores, side by side| Claude Fable 5.1 | GPT-5.6 Sol | |
|---|---|---|
| Intelligence | 53.4 best | 47.0 |
| Terminal-Bench | 91% best | 90% |
| GPQA Diamond | 94% | 94% |
| Output speed | 71 t/s | 94 t/s best |
| Latency (TTFT) | 249.68s | 138.40s best |
Cost calculator
choose a serving route for each sideInput tokens / month
Output tokens / month
Claude Fable 5.1
via Amazon Bedrock
$100
GPT-5.6 Sol
via OpenRouter
$20
Capabilities
feature support, side by side| Feature | Claude Fable 5.1 | GPT-5.6 Sol |
|---|---|---|
| Vision | ✓ | ✓ |
| Tool use | ✓ | ✓ |
| Reasoning | ✓ | ✓ |
| Audio | — | — |
| Prompt caching | ✓ | ✓ |
| Structured output | ✓ | ✓ |
| Web search | ✓ | ✓ |
Related comparisons
Frequently asked questions
Which is cheaper, Claude Fable 5.1 or GPT-5.6 Sol?
GPT-5.6 Sol is cheaper for input ($10.00 vs $2.00 per 1M tokens) as an OpenRouter routed quote, while OpenAI lists it at $4.00 per 1M input. GPT-5.6 Sol is cheaper for output ($50.00 vs $10.00 per 1M tokens) as an OpenRouter routed quote, while OpenAI lists it at $20.00 per 1M output.
What is the context window difference between Claude Fable 5.1 and GPT-5.6 Sol?
Claude Fable 5.1 has a 1M-token context window and GPT-5.6 Sol has 1.1M tokens, so GPT-5.6 Sol can take a larger prompt.
How do Claude Fable 5.1 and GPT-5.6 Sol 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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