Gemini 4 Argon vs Claude Fable 5.1
Gemini 4 Argon is from Google, released September 30, 2026. Claude Fable 5.1 is from Anthropic, released September 1, 2026.
- LMArena Elo1525 vs 1501. Gemini 4 Argon is 1.6% ahead on LMArena Elo.
- Input per 1M$2 vs $10. Gemini 4 Argon costs 80% less per million input tokens.
- Output per 1M$10 vs $50. Gemini 4 Argon costs 80% less per million output tokens.
Prices are the vendors’ published API rates; Elo is LMArena’s text board. Each figure is dated on its model page.
Interactive Comparison
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$2 / $10 per 1M tokens (introductory, announced); $4 / $20 after - not yet purchasable | $10 / $50 per 1M tokens | |
|---|---|---|
| Identity | ||
| Developer | Anthropic | |
| Released | Sep 2026 | Sep 2026 |
| Status | Limited preview - rolling out to trusted cyber defenders through the Fairwind Program; not generally available | GA |
| Licence | Proprietary | Proprietary |
| Self-hostable | No | No |
| Cost | ||
| Blended $/1M tokensinput × 0.75 + output × 0.25 | $4.000 / 1M tokens | $20.000 / 1M tokens |
| Input price | $2.000 / 1M tokens | $10.000 / 1M tokens |
| Output price | $10.000 / 1M tokens | $50.000 / 1M tokens |
| Cached input | — | $0.25 / 1M tokens (cache read, 2.5% of base input) |
| Batch discount | — | 50% off (Batch API) |
| Capacity | ||
| Context window | — | 1M tokens |
| Max output | 1M tokens (up from 64K) | 128k tokens |
| Capability | ||
| Vision in | Yes | Yes |
| Audio in | — | No |
| Extended reasoning | — | Adaptive thinking, always on; default effort high |
| Access | ||
| API | Not yet - wider availability announced for later | Yes |
| Chat app | Not yet | Yes |
| Fine-tuning | Not stated | No |
| Measured quality | ||
| LMArena Elo | 1525 (checked Oct 2026) | 1501 (checked Oct 2026) |
| LMArena rank | Rank 1 | Rank 6 |
| Elo per dollarLMArena Elo ÷ blended $/1M tokens | 381 | 75 |
