Claude Opus 4.8 vs Gemini 3.1 Pro Preview
Price, context and benchmark scores side by side — every number from the live model catalogue.
| Claude Opus 4.8anthropic | Gemini 3.1 Pro Previewgoogle | |
|---|---|---|
| Input / 1M tokens | $5.00 | $2.00 |
| Output / 1M tokens | $25.00 | $12.00 |
| 1M in + 300K out | $12.50 | $5.60 |
| Context window | 1M | 1.0M |
| Intelligence index | 55.7 | 46.5 |
| Coding index | 74.3 | 68.8 |
| Agentic index | 47.2 | 21.4 |
| Cheapest provider | Azure | |
| Providers serving it | 4 | 2 |
| Weights | Closed | Closed |
| Image input | Yes | Yes |
| Tool calling | Yes | Yes |
| Reasoning mode | Yes | Yes |
| Released | May 27, 2026 | Feb 19, 2026 |
Which one to pick
Pick Claude Opus 4.8 if…
- You want the higher general-intelligence score (55.7).
- Code quality is the priority — it leads on the coding index (74.3).
- You are running agent loops — higher agentic index (47.2).
- You want provider redundancy: 4 providers serve it.
Pick Gemini 3.1 Pro Preview if…
- Token cost matters: $12.00 per 1M output vs $25.00.
- You need the bigger context window (1.0M).
FAQ
Is Claude Opus 4.8 better than Gemini 3.1 Pro Preview?
Claude Opus 4.8 scores higher on general intelligence (55.7 vs 46.5), while Gemini 3.1 Pro Preview is 2.1× cheaper per output token ($12.00 vs $25.00). For code, Claude Opus 4.8 leads (74.3 coding index). Gemini 3.1 Pro Preview takes the larger context at 1.0M.
Which is cheaper, Claude Opus 4.8 or Gemini 3.1 Pro Preview?
Gemini 3.1 Pro Preview, at $12.00 per 1M output tokens versus $25.00. On a 1M input + 300K output workload that is $5.60 against $12.50.
Can I self-host Claude Opus 4.8 or Gemini 3.1 Pro Preview?
Claude Opus 4.8: closed weights, API only. Gemini 3.1 Pro Preview: closed weights, API only.