Claude Opus 5.5 vs Gemini 4 Argon
⚖ Claude Opus 5.5 wins 3 of 4 categories, but Gemini 4 Argon is 2.0× cheaper for research and long documents. Pick Claude Opus 5.5 when quality matters most, Gemini 4 Argon at volume.
Scores by category
| Category | Claude Opus 5.5 | Gemini 4 Argon |
|---|---|---|
| Overall | 97 | 96 |
| Writing | 100 | 95 |
| Support | 90 | 97 |
| Coding | 100 | 84 |
Provisional scores, 0 to 100 among the models we track, from Arena and Epoch AI. Value weighs the overall score against cost.
Price and specs
| Claude Opus 5.5 | Gemini 4 Argon | |
|---|---|---|
| Vendor | Anthropic | |
| Released | 2026-09-22 | 2026-10-13 |
| Context window | 1M | 1M |
| Open weights | No | No |
| Input per 1M tokens | $4.00 | $2.00 |
| Output per 1M tokens | $20.00 | $10.00 |
| Per 1,000 reports | $110 | $55.00 |