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Claude Fable 5 vs Grok 3 Fast

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Anthropic · 1M context  |  xAI · 128k context

Pricing Comparison

MetricClaude Fable 5Grok 3 Fast
Input / 1M tokens$10$5
Output / 1M tokens$50$25
Cached input / 1M$1—
Context window1M128k
ProviderAnthropicxAI

Cost Calculator

💰 Grok 3 Fast saves $5,250.00/month (50% cheaper)
AClaude Fable 5
Per request$0.0350
Daily$350.00
Monthly$10,500.00
Yearly$127,750.00
XGrok 3 FastCHEAPER
Per request$0.0175
Daily$175.00
Monthly$5,250.00
Yearly$63,875.00
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Choose Claude Fable 5 when…

  • ✓ Larger context window (1M vs 128k) — better for long documents
  • ✓ Supports prompt caching — save up to 90% on repeated prompts
  • ✓ Optimized for: Frontier reasoning & agents
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Choose Grok 3 Fast when…

  • ✓ Cheaper for RAG & document retrieval (lower input cost)
  • ✓ 50% cheaper per input token
  • ✓ Cheaper for generation-heavy workloads (lower output cost)
  • ✓ Optimized for: Low-latency flagship tasks

Related Comparisons

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