Claude Fable 5.1 vs Grok 4.6
API pricing, context window and capabilities for Claude Fable 5.1 and Grok 4.6, 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. Grok 4.6 wins on price.
Price
Grok 4.6
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 524K)
Grok 4.6 wins
- Cheaper input ($10.00 vs $2.00 /1M)
- Cheaper output ($50.00 vs $6.00 /1M)
- Higher max output (128K vs 524K)
- More serving providers (7 vs 8)
Cheaper overall
Grok 4.6
$2.00 + $6.00 /1M
Larger context
Claude Fable 5.1
1M
More providers
Grok 4.6
8 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 | Grok 4.6 | |
|---|---|---|
| Input $/1M | $10.00via Anthropic | $2.00via xAI best |
| Output $/1M | $50.00via Anthropic | $6.00via xAI best |
| Context window | 1M best | 524K |
| Max output | 128K | 524K best |
| Serving providers | 7 | 8 best |
| Date | Released Sep 1, 2026 | Released Aug 10, 2026 |
Benchmarks
Benchmark scores, side by side| Claude Fable 5.1 | Grok 4.6 | |
|---|---|---|
| Intelligence | 53.4 best | 44.3 |
| Terminal-Bench | 91% best | 88% |
| GPQA Diamond | 94% | 95% best |
| Output speed | 71 t/s best | 56 t/s |
| Latency (TTFT) | 249.68s | 43.86s best |
Cost calculator
choose a serving route for each sideInput tokens / month
Output tokens / month
Claude Fable 5.1
via Amazon Bedrock
$100
Grok 4.6
via OpenRouter
$16
Capabilities
feature support, side by side| Feature | Claude Fable 5.1 | Grok 4.6 |
|---|---|---|
| Vision | ✓ | ✓ |
| Tool use | ✓ | ✓ |
| Reasoning | ✓ | ✓ |
| Audio | — | — |
| Prompt caching | ✓ | ✓ |
| Structured output | ✓ | ✓ |
| Web search | ✓ | ✓ |
Related comparisons
Frequently asked questions
Which is cheaper, Claude Fable 5.1 or Grok 4.6?
Grok 4.6 is cheaper for input ($10.00 vs $2.00 per 1M tokens) from xAI. Grok 4.6 is cheaper for output ($50.00 vs $6.00 per 1M tokens) from xAI.
What is the context window difference between Claude Fable 5.1 and Grok 4.6?
Claude Fable 5.1 has a 1M-token context window and Grok 4.6 has 524K tokens, so Claude Fable 5.1 can take a larger prompt.
How do Claude Fable 5.1 and Grok 4.6 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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