ModelRefs / Claude 3.5 Sonnet vs o3 — Benchmarks, Pricing & Coding Comp…
Claude 3.5 Sonnet vs o3 — Benchmarks, Pricing & Coding Comp…
Claude 3.5 Sonnet vs o3: 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 that set a new standard for agentic coding tasks, achieving top results on SWE-Bench Verified and introducing computer-use capabilities. It remains the most widely adopted Claude model for production coding workflows.
o3: o3 is OpenAI's extended-thinking reasoning model, applying deliberate chain-of-thought computation to excel on mathematics, science, and competitive programming tasks. Released in April 2025, it introduced OpenAI's scalable test-time compute approach at production scale.
Context window: Claude 3.5 Sonnet accepts up to 200,000 tokens, o3 up to 200,000. Confirm the limit for your specific deployment channel before relying on it.
Claude 3.5 Sonnet vs o3 at a glance
| Attribute | Claude 3.5 Sonnet | o3 |
|---|---|---|
| Provider | Anthropic | OpenAI |
| Released | 2024-06-20 | 2025-04-01 |
| Context window | 200,000 tokens | 200,000 tokens |
| Input price | $3/M tokens | $10/M tokens |
| Output price | $15/M tokens | $40/M tokens |
| Licence | Proprietary | Proprietary |
| Self-hostable | No, hosted only | No, hosted only |
| Modalities | text, vision | text, vision |
Where they differ most
- Cost Efficiency: Claude 3.5 Sonnet 37%, o3 13%. Claude 3.5 Sonnet 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 o3 — Benchmarks, Pricing & Coding Comp….
Frequently asked questions
Which is better, Claude 3.5 Sonnet or o3?
Claude 3.5 Sonnet and o3 target different workloads — see the benchmark and pricing tables for a side-by-side answer.
Is Claude 3.5 Sonnet cheaper than o3?
Compare $0.00300 vs $0.0100 on this page.