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: 2026-08-14.
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
- Arena ELO: 1495 (as of 2026-08-13)
- 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
- Arena ELO: 1485 (as of 2026-08-13)
- Full GPT-5.5 Pro pricing page
Cost per request by business use case
List price vs optimized (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 | Claude Fable 5 optimized | GPT-5.5 Pro list | GPT-5.5 Pro optimized |
|---|---|---|---|---|---|
| Support Ticket | 1,500 / 500 | $0.040 | $0.032 | $0.135 | $0.135 |
| Knowledge Q&A | 2,000 / 800 | $0.060 | $0.047 | $0.204 | $0.204 |
| Meeting Summary | 10,000 / 1,200 | $0.160 | $0.076 | $0.516 | $0.258 |
| Marketing Content | 2,500 / 1,800 | $0.115 | $0.110 | $0.399 | $0.399 |
| Coding Task | 3,000 / 2,000 | $0.130 | $0.117 | $0.450 | $0.450 |
| Invoice Processing | 1,500 / 600 | $0.045 | $0.021 | $0.153 | $0.076 |
| Call Summary | 2,000 / 700 | $0.055 | $0.027 | $0.186 | $0.093 |
| Agent Workflow | 6,000 / 3,000 | $0.210 | $0.172 | $0.720 | $0.720 |
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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.