Claude Fable 5 (batch) vs GPT-5.6 Terra
Side-by-side API pricing and Artificial Analysis performance for Claude Fable 5 (batch) (Anthropic) and GPT-5.6 Terra (OpenAI). Green cells mark the better value in each row.
Prices updated Sep 18, 2026, 5:39 PM UTC · refreshed hourly
| Claude Fable 5 (batch) Anthropic | GPT-5.6 Terra OpenAI | |
|---|---|---|
| Pricing | ||
| Input $/1M | $5.00 | $2.00 |
| Output $/1M | $25.00 | $12.00 |
| Blended $/1M (3:1) | $10.00 | $4.50 |
| RAG example (30K in / 2K out) | $0.2 | $0.084 |
| Quality & speed | ||
| Intelligence Index | 49.7 | 42.3 |
| Coding Index | 76.5 | 76.7 |
| Agentic Index | 51 | 43.7 |
| Output speed (tok/s) | 67 | 85 |
| Time to first token | 43.18s | 116.63s |
| Specs | ||
| Context window | 1M | 1.05M |
| Input modalities | text, image, file | file, image, text |
FAQ
Which is cheaper, Claude Fable 5 (batch) or GPT-5.6 Terra?
GPT-5.6 Terra has the lower blended API price at $4.50 per 1M tokens (3:1 input:output mix), versus $10.00 for the other model. Prices are live from OpenRouter and refresh about hourly.
Which is better for RAG workloads?
For a typical RAG request (30K input / 2K output tokens), GPT-5.6 Terra costs about $0.084 per request versus $0.2. Also compare context windows: Claude Fable 5 (batch) offers 1M and GPT-5.6 Terra offers 1.05M.
Which scores higher on Artificial Analysis benchmarks?
Claude Fable 5 (batch) leads on the Artificial Analysis Intelligence Index (49.7 vs 42.3). Check coding and agentic indices on this page for workload-specific tradeoffs.