GPT-5 Nano is 133.3× cheaper per million tokens (blended). Claude Fable 5 has the larger context window (1,000,000 vs 400,000 tokens, 2.5×).
Claude Fable 5 vs GPT-5 Nano
Live catalog fields. Best-in-row is highlighted.
Claude Fable 5
Anthropic · anthropic__claude-fable-5
GPT-5 Nano
OpenAI · openai__gpt-5-nano
Identity
| Field | anthropic__claude-fable-5 | openai__gpt-5-nano |
|---|---|---|
| Provider | Anthropic | OpenAI |
| Slug | anthropic__claude-fable-5 | openai__gpt-5-nano |
| Status | live | live |
| Open weights | No | No |
| License | — | — |
| HuggingFace | — | — |
Quality
| Field | anthropic__claude-fable-5 | openai__gpt-5-nano |
|---|---|---|
| Quality index (0–100) | 89.4 | — |
Cost
| Field | anthropic__claude-fable-5 | openai__gpt-5-nano |
|---|---|---|
| Input $ / 1M tokens | $10.00 | $0.05 |
| Cached input $ / 1M | $1.00 | $0.01 |
| Output $ / 1M tokens | $50.00 | $0.40 |
Context
| Field | anthropic__claude-fable-5 | openai__gpt-5-nano |
|---|---|---|
| Max context tokens | 1,000,000 | 400,000 |
| Max output tokens | 128,000 | 128,000 |
Modalities
| Field | anthropic__claude-fable-5 | openai__gpt-5-nano |
|---|---|---|
| Input | text, image, file | text, image, file |
| Output | text | text |