Claude Fable 5 vs Grok 4 20 Non Reasoning
API pricing, context window and capabilities for Claude Fable 5 and Grok 4 20 Non Reasoning, 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 wins on intelligence. Grok 4 20 Non Reasoning wins on price and on context window. Benchmark data is unavailable for one or both models.
Price
Grok 4 20 Non Reasoning
Terminal-Bench
Not called
Intelligence
Claude Fable 5
Context window
Grok 4 20 Non Reasoning
Key takeaways
who wins on what, from the published numbersClaude Fable 5 wins
- More serving providers (9 vs 5)
Grok 4 20 Non Reasoning wins
- Cheaper input ($10.00 vs $1.25 /1M)
- Cheaper output ($50.00 vs $2.50 /1M)
- Larger context window (1M vs 2M)
- Higher max output (128K vs 2M)
Cheaper overall
Grok 4 20 Non Reasoning
$1.25 + $2.50 /1M
Larger context
Grok 4 20 Non Reasoning
2M
More providers
Claude Fable 5
9 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 | Grok 4 20 Non Reasoning | |
|---|---|---|
| Input $/1M | $10.00via Anthropic | $1.25via xAI best |
| Output $/1M | $50.00via Anthropic | $2.50via xAI best |
| Context window | 1M | 2M best |
| Max output | 128K | 2M best |
| Serving providers | 9 best | 5 |
| Date | Released Jun 9, 2026 | Released Mar 9, 2026 |
Benchmarks
Benchmark scores, side by side| Claude Fable 5 | Grok 4 20 Non Reasoning | |
|---|---|---|
| Intelligence | 49.6 best | 14.2 |
| Terminal-Bench | 85% | Not available |
| GPQA Diamond | 93% best | 78% |
| Output speed | 66 t/s | 94 t/s best |
| Latency (TTFT) | 129.27s | 0.62s best |
Cost calculator
choose a serving route for each sideInput tokens / month
Output tokens / month
Claude Fable 5
via Azure
$100
Grok 4 20 Non Reasoning
via Azure
$8.75
Capabilities
feature support, side by side| Feature | Claude Fable 5 | Grok 4 20 Non Reasoning |
|---|---|---|
| Vision | ✓ | ✓ |
| Tool use | ✓ | ✓ |
| Reasoning | ✓ | ✓ |
| Audio | — | — |
| Prompt caching | ✓ | ✓ |
| Structured output | ✓ | ✓ |
| Web search | ✓ | ✓ |
Related comparisons
Frequently asked questions
Which is cheaper, Claude Fable 5 or Grok 4 20 Non Reasoning?
Grok 4 20 Non Reasoning is cheaper for input ($10.00 vs $1.25 per 1M tokens) from xAI. Grok 4 20 Non Reasoning is cheaper for output ($50.00 vs $2.50 per 1M tokens) from xAI.
What is the context window difference between Claude Fable 5 and Grok 4 20 Non Reasoning?
Claude Fable 5 has a 1M-token context window and Grok 4 20 Non Reasoning has 2M tokens, so Grok 4 20 Non Reasoning can take a larger prompt.
How do Claude Fable 5 and Grok 4 20 Non Reasoning compare on benchmarks?
On the tracked benchmarks, Claude Fable 5 leads on intelligence.
Listed prices from LiteLLM, OpenRouter and Vercel · last checked Oct 14, 2026
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