Gemini 2.5 Pro vs Claude Sonnet 4.6
Google's Gemini 2.5 Pro against Anthropic's Claude Sonnet 4.6 — pricing, benchmarks, context, and best use cases compared side by side.
Gemini 2.5 Pro and Claude Sonnet 4.6 are virtually tied on benchmark quality (Elo 1380 vs 1385), but Gemini 2.5 Pro is 38% cheaper on blended cost.
| Input Price | $1.25/1M | $3.00/1M |
| Output Price | $10.00/1M | $15.00/1M |
| Blended Price | $5.62/1M | $9.00/1M |
| LMSYS Elo | 1380 | 1385 |
| Context Window | 1,000,000 | 1,000,000 |
| Provider | Anthropic |
Pricing breakdown
When comparing LLM API pricing, Gemini 2.5 Pro charges $1.25 per 1M input tokens compared to Claude Sonnet 4.6's $3.00 — a 58% difference. For output tokens, Gemini 2.5 Pro costs $10.00/1M versus $15.00/1M for Claude Sonnet 4.6. On a blended basis (averaging input and output), Gemini 2.5 Pro comes in at $5.62/1M tokens versus $9.00/1M for Claude Sonnet 4.6.
Quality & benchmarks
In terms of quality, Gemini 2.5 Pro (Elo 1380) and Claude Sonnet 4.6 (Elo 1385) are essentially neck-and-neck on the LMSYS Chatbot Arena leaderboard. The 5-point gap is within the margin of uncertainty, meaning both models deliver comparable output quality for most use cases. Your choice between them should come down to pricing, ecosystem preferences, and specific feature needs rather than raw benchmark performance.
Context window comparison
Both Gemini 2.5 Pro and Claude Sonnet 4.6 offer a 1M-token context window, making them equally suited for processing large codebases, lengthy documents, and multi-turn conversations.
Monthly cost estimate
Adjust the sliders to see how costs compare for your workload.