Claude Fable 5.2 vs Sonar Reasoning Pro
Price, context window & benchmark comparison
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Compare different models
Verdict: Sonar Reasoning Pro is 4.6× cheaper than Claude Fable 5.2 on a typical 3:1 input/output mix. Claude Fable 5.2 has the larger context window (1M vs 128K).
| Claude Fable 5.2 | Sonar Reasoning Pro | |
|---|---|---|
| Input price / 1M | $8.00 | $2.00 |
| Output price / 1M | $40.00 | $8.00 |
| Blended price (3:1) | $16.00 | $3.50 |
| Cached input / 1M | $0.20 | — |
| Context window | 1M | 128K |
| Max output | 128K | 115K |
| Intelligence index | 64.6 | — |
| Coding index | — | — |
| Providers | 5 | — |
| Best provider uptime (30m) | 100.0% | — |
| Vision input | Yes | Yes |
| Reasoning | Yes | Yes |
| Tool calling | Yes | No |
| Released | 2026-11-07 | 2025-03-07 |
| Retirement | — | — |
Cost calculator
FAQ
Which is cheaper, Claude Fable 5.2 or Sonar Reasoning Pro?
Sonar Reasoning Pro is 4.6× cheaper than Claude Fable 5.2 on a typical 3:1 input/output mix.
Claude Fable 5.2 vs Sonar Reasoning Pro: which has a bigger context window?
Claude Fable 5.2: 1,000,000 tokens. Sonar Reasoning Pro: 128,000 tokens.
How much would 1 million requests cost?
At 2,000 input + 500 output tokens per request: Claude Fable 5.2 ≈ $36,000, Sonar Reasoning Pro ≈ $8,000.
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