ModelRefs / o3 Pro vs Claude 3.7 Sonnet
o3 Pro vs Claude 3.7 Sonnet
o3 Pro vs Claude 3.7 Sonnet: side-by-side benchmarks, pricing, context windows, coding ability and deployment. Pick the right model for your stack.
Overview
Claude 3.7 Sonnet: Claude 3.7 Sonnet is Anthropic's February 2025 hybrid reasoning model, combining immediate answers with an optional extended thinking mode in a single model rather than two. Thinking can be budgeted by token count up to a 128,000-token output limit, across a 200,000-token context window. The claude-3-7-sonnet-20250219 snapshot was deprecated on 28 October 2025 and retired on Anthropic-operated platforms on 19 February 2026.
o3 Pro: o3 Pro is OpenAI's highest-capability reasoning model, applying extended compute at inference time to solve complex scientific, mathematical, and programming problems. It achieved the highest published scores on ARC-AGI-2 and competitive programming benchmarks at its June 2025 release.
Context window: Claude 3.7 Sonnet accepts up to 200,000 tokens, o3 Pro up to 200,000. Confirm the limit for your specific deployment channel before relying on it.
Claude 3.7 Sonnet vs o3 Pro at a glance
| Attribute | Claude 3.7 Sonnet | o3 Pro |
|---|---|---|
| Provider | Anthropic | OpenAI |
| Released | 2025-02-24 | 2025-06-10 |
| Context window | 200,000 tokens | 200,000 tokens |
| Input price | $3/M tokens | $20/M tokens |
| Output price | $15/M tokens | $80/M tokens |
| Licence | Proprietary | Proprietary |
| Self-hostable | No, hosted only | No, hosted only |
| Modalities | text, vision | text, vision |
Where they differ most
- Coding: Claude 3.7 Sonnet 64%, o3 Pro 85%. o3 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 o3 Pro vs Claude 3.7 Sonnet.
Frequently asked questions
Which is better, o3 Pro or Claude 3.7 Sonnet?
o3 Pro and Claude 3.7 Sonnet target different workloads — see the benchmark and pricing tables for a side-by-side answer.
Is o3 Pro cheaper than Claude 3.7 Sonnet?
Compare $0.0200 vs $0.00300 on this page.