Claude Sonnet 5 vs o1
Pricing, benchmarks, and use case comparison
Quick take
- •Claude Sonnet 5 is meaningfully stronger at speed (82 vs 30 on our capability index).
- •Claude Sonnet 5 is 80% cheaper on input tokens, which compounds fast on high-volume or agentic workloads.
- •Claude Sonnet 5 has a 1M context window vs 200,000 tokens (100,000 max output) - better for whole-repo or long-document work.
Specs comparison
| Claude Sonnet 5 | o1 | |
|---|---|---|
| Provider | Anthropic | OpenAI |
| Type | Closed source | Closed source |
| Context window | ✓1M | 200,000 tokens (100,000 max output) |
| Input / 1M tokens | ✓$3.00 | $15.00 |
| Output / 1M tokens | $15.00 | $60.00 |
| Release date | 2026-06 | 2024-12 |
Benchmarks
| Benchmark | Claude Sonnet 5 | o1 |
|---|---|---|
| SWE-bench Verified | ~85.2% | - |
| Terminal-Bench 2.1 | 80.4% | - |
| SWE-bench Pro | 63.2% | - |
| OSWorld-Verified | 81.2% | - |
| AIME 2024 | - | 74% |
| GPQA Diamond | - | 77.3% |
| Codeforces | - | ~89th percentile |
Scores sourced from official provider release posts and independent benchmark aggregators.
Which should you choose?
Choose Claude Sonnet 5 if...
- →You want frontier-adjacent agentic coding but need better cost-efficiency than Opus
- →You are running high-volume agent loops and want strong reasoning per dollar
- →You are already on Sonnet 4.6 and want a same-price capability upgrade
- →You need a 1M context window with fast latency
Choose o1 if...
- →Hard, multi-step math, science, and logic problems that reward deliberate reasoning
- →Competitive programming and algorithmic problem solving
- →Existing o1-based pipelines already validated for reasoning tasks