Claude Fable 5.1 vs Grok Build 0.1
Price, context window & benchmark comparison
VS
Compare different models
Verdict: Grok Build 0.1 is 16.0× cheaper than Claude Fable 5.1 on a typical 3:1 input/output mix. Claude Fable 5.1 has the larger context window (1M vs 256K).
| Claude Fable 5.1 | Grok Build 0.1 | |
|---|---|---|
| Input price / 1M | $10.00 | $1.00 |
| Output price / 1M | $50.00 | $2.00 |
| Blended price (3:1) | $20.00 | $1.25 |
| Cached input / 1M | $0.25 | $0.20 |
| Context window | 1M | 256K |
| Max output | 128K | 230K |
| Intelligence index | 53.4 | — |
| Coding index | 81.6 | 51.5 |
| Providers | 4 | 4 |
| Best provider uptime (30m) | 100.0% | — |
| Vision input | Yes | Yes |
| Reasoning | Yes | Yes |
| Tool calling | Yes | Yes |
| Released | 2026-09-01 | 2026-05-20 |
| Retirement | — | — |
Cost calculator
FAQ
Which is cheaper, Claude Fable 5.1 or Grok Build 0.1?
Grok Build 0.1 is 16.0× cheaper than Claude Fable 5.1 on a typical 3:1 input/output mix.
Claude Fable 5.1 vs Grok Build 0.1: which has a bigger context window?
Claude Fable 5.1: 1,000,000 tokens. Grok Build 0.1: 256,000 tokens.
How much would 1 million requests cost?
At 2,000 input + 500 output tokens per request: Claude Fable 5.1 ≈ $45,000, Grok Build 0.1 ≈ $3,000.
More comparisons
Claude Fable 5.1 vs GLM 5.3 PrimeClaude Fable 5.1 vs Qwen3.8 Max PrimeClaude Fable 5.1 vs Command A+Claude Fable 5.1 vs GPT-6 Luna ProClaude Fable 5.1 vs GPT-6 LunaClaude Fable 5.1 vs GPT-6 Sol ProClaude Fable 5.1 vs GPT-6 SolClaude Fable 5.1 vs Claude Opus 5.5Claude Fable 5.1 vs MiMo-V2.6-Pro-UltraSpeedClaude Fable 5.1 vs MiMo-V2.6-FlashClaude Fable 5.1 vs Grok 4.7Claude Fable 5.1 vs Qwen3.8 Omni FlashClaude Fable 5.1 vs GLM 5.3 FlashXClaude Fable 5.1 vs DeepSeek V4.1 FlashClaude Fable 5.1 vs GPT-6 AstraClaude Fable 5.1 vs GPT-6 Astra ProGrok Build 0.1 vs GLM 5.3 PrimeGrok Build 0.1 vs Qwen3.8 Max PrimeGrok Build 0.1 vs Command A+Grok Build 0.1 vs GPT-6 Luna ProGrok Build 0.1 vs GPT-6 LunaGrok Build 0.1 vs GPT-6 Sol ProGrok Build 0.1 vs GPT-6 SolGrok Build 0.1 vs Claude Opus 5.5