Claude Fable 5 vs GPT-5.5 Pro: API Pricing Comparison
Anthropic Claude Fable 5 vs OpenAI GPT-5.5 Pro: token prices, batch and cache rates, Arena ELO, and cost per request for 8 business use cases. Prices in USD per 1 million tokens. Data snapshot: 2026-09-28.
Claude Fable 5 pricing (Anthropic)
- Input: $10.00 per 1M tokens
- Output: $50.00 per 1M tokens
- Batch API (input/output): $5.00 / $25.00
- Prompt-cache read: $1.00
- Context window: 1M
- Full Claude Fable 5 pricing page
GPT-5.5 Pro pricing (OpenAI)
- Input: $30.00 per 1M tokens
- Output: $180.00 per 1M tokens
- Batch API (input/output): $15.00 / $90.00
- Prompt-cache read: not published
- Context window: 1M
- Full GPT-5.5 Pro pricing page
Cost per 1,000 requests by business use case
List price vs after discounts (prompt caching on the cached input share, batch API for async workloads, only where the provider publishes those rates).
| Use case | Tokens (in/out) | Claude Fable 5 list price | Claude Fable 5 after discounts | GPT-5.5 Pro list price | GPT-5.5 Pro after discounts |
|---|---|---|---|---|---|
| Support Ticket | 1,500 / 500 | $40.00 | $32.35 | $135.00 | $135.00 (no published discount) |
| Knowledge Q&A | 2,000 / 800 | $60.00 | $48.10 | $204.00 | $204.00 (no published discount) |
| Meeting Summary | 10,000 / 1,200 | $160.00 | $77.50 | $516.00 | $258.00 |
| Marketing Content | 2,500 / 1,800 | $115.00 | $110.75 | $399.00 | $399.00 (no published discount) |
| Coding Task | 3,000 / 2,000 | $130.00 | $117.25 | $450.00 | $450.00 (no published discount) |
| Invoice Processing | 1,500 / 600 | $45.00 | $21.37 | $153.00 | $76.50 |
| Call Summary | 2,000 / 700 | $55.00 | $27.00 | $186.00 | $93.00 |
| Agent Workflow | 6,000 / 3,000 | $210.00 | $174.30 | $720.00 | $720.00 (no published discount) |
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These are list prices: real cost also depends on caching, batching, negotiated discounts, marketplace agreements, and existing contracts. Get a FinOps review from OptimNow or compare all models.