ModelRefs / Claude 3.5 Sonnet vs Gemini 2.5 Pro
Claude 3.5 Sonnet vs Gemini 2.5 Pro
Claude 3.5 Sonnet vs Gemini 2.5 Pro: side-by-side benchmarks, pricing, context windows, coding ability and deployment. Pick the right model for your stack.
Overview
Claude 3.5 Sonnet: Claude 3.5 Sonnet is Anthropic's mid-2024 balanced model, the release that introduced computer use and anchored Anthropic's agentic-coding positioning for its generation across a 200,000-token context window. It is now retired: Anthropic deprecated both the claude-3-5-sonnet-20240620 and claude-3-5-sonnet-20241022 snapshots on 13 August 2025 and retired them on 28 October 2025 on Anthropic-operated platforms, naming Claude Sonnet 5.5 as the replacement.
Gemini 2.5 Pro: Gemini 2.5 Pro is Google DeepMind's experimental thinking model with a 2M-token multimodal context window, released in March 2025. It topped the LMSys Chatbot Arena leaderboard at launch and introduced adaptive reasoning budgets that balance response quality against latency.
Context window: Claude 3.5 Sonnet accepts up to 200,000 tokens, Gemini 2.5 Pro up to 2,000,000. Confirm the limit for your specific deployment channel before relying on it.
Claude 3.5 Sonnet vs Gemini 2.5 Pro at a glance
| Attribute | Claude 3.5 Sonnet | Gemini 2.5 Pro |
|---|---|---|
| Provider | Anthropic | |
| Released | 2024-06-20 | 2025-06-17 |
| Context window | 200,000 tokens | 2,000,000 tokens |
| Input price | $3/M tokens | $1.25/M tokens |
| Output price | $15/M tokens | $10/M tokens |
| Licence | Proprietary | Proprietary |
| Self-hostable | No, hosted only | No, hosted only |
| Modalities | text, vision | text, vision, audio, video |
Benchmarks reported for both
| Benchmark | Claude 3.5 Sonnet | Gemini 2.5 Pro | Reported |
|---|---|---|---|
| SWE-Bench Verified (resolved) | 49 | 67.2 | 2025-01-06 / 2025-07-02 |
Each row compares the same benchmark, the same reported metric, and the same task set. Scores are as published by their cited sources on the dates shown. Different runs still use different harnesses and prompts, so treat these as directional evidence rather than a head-to-head result.
Where they differ most
- Coding: Claude 3.5 Sonnet 49%, Gemini 2.5 Pro 66%. Gemini 2.5 Pro leads on this dimension.
- Agentic: Claude 3.5 Sonnet 49%, Gemini 2.5 Pro 66%. Gemini 2.5 Pro leads on this dimension.
- Cost Efficiency: Claude 3.5 Sonnet 37%, Gemini 2.5 Pro 47%. Gemini 2.5 Pro leads on this dimension.
Capability scores are ModelRefs' own derived signals, not vendor claims or benchmark results. Validate against your own workload before relying on them.
Continue your research
Use these connected ModelRefs sections to compare alternatives, inspect implementation paths, and review the evidence and governance boundaries relevant to Claude 3.5 Sonnet vs Gemini 2.5 Pro.
Frequently asked questions
Which is better, Claude 3.5 Sonnet or Gemini 2.5 Pro?
Claude 3.5 Sonnet and Gemini 2.5 Pro target different workloads — see the benchmark and pricing tables for a side-by-side answer.
Is Claude 3.5 Sonnet cheaper than Gemini 2.5 Pro?
Compare $0.00300 vs $0.00125 on this page.