Anthropic: Claude Fable 5.1 vs OpenAI: o3
OpenAI: o3 is cheaper than Anthropic: Claude Fable 5.1 by about 83% on a blended (75% input / 25% output) basis. Anthropic: Claude Fable 5.1 charges $10.000000 / $50.000000 per 1M input/output tokens; OpenAI: o3 charges $2.000000 / $8.000000.
| Field | Anthropic: Claude Fable 5.1 | OpenAI: o3 |
|---|---|---|
| Input $/Mtok | $10.000000 | $2.000000 |
| Output $/Mtok | $50.000000 | $8.000000 |
| Cache read $/Mtok | $0.250000 | $0.500000 |
| Cache write $/Mtok | $12.500000 | – |
| Input $/Mchar | n/a | 0.563428 |
| Output $/Mchar | n/a | 2.253712 |
| Context window | 1000000 | 200000 |
| Tokenizer | claude | o200k |
Price history
Same workload, monthly cost
Illustrative monthly cost at 10M tokens/month, split per workload preset. Not a substitute for the calculator, which uses your own volume, cache and batch assumptions.
| Workload | Anthropic: Claude Fable 5.1 | OpenAI: o3 |
|---|---|---|
| Coding agent | $120.00 | $23.00 |
| RAG chat | $160.00 | $29.00 |
| Summarisation (batch) | $140.00 | $26.00 |
| Classification | $108.00 | $21.20 |
| Chat assistant | $260.00 | $44.00 |
| Content generation | $420.00 | $68.00 |
Cite this page
Anthropic: Claude Fable 5.1 vs OpenAI: o3: $10.000000/$50.000000 vs $2.000000/$8.000000 per 1M tokens, as of 2026-10-04 (Token Barometer, https://tokenbarometer.com/compare/anthropic_claude-fable-5-1-vs-openai_o3).
Anthropic: Claude Fable 5.1 page | OpenAI: o3 page | Open in calculator