Compare / head-to-head
Claude 3.5 Sonnetvso3
o3 leads 4 of 4 shared benchmarks. o3 is 1.8x cheaper per token. Both offer a 200K-token context window.
Benchmarks from cited public sources; pricing from official pages; status from official provider feeds.
Shared benchmarks
0 – 4
o3 leads
Cheaper per token
o3
1.8x cheaper, input + output
Larger context
Tie
both 200K tokens
Provider uptime (30d)
100% · 94.2446%
Anthropic · OpenAI
Claude 3.5 Sonnet
Anthropic · released 2024-10-22
textvision
Quality
Benchmark matrix
4 shared · 0 only Claude 3.5 Sonnet · 3 only o3| Benchmark | Claude 3.5 Sonnet | o3 | Δ | Edge |
|---|---|---|---|---|
| Reported by both · 4 | ||||
| SWE-bench Verified | 49% ↗ | 69.1% ↗ | -20.1 pt | o3 |
| GPQA Diamond | 55.3% ↗epoch | 81.8% ↗epoch | -26.5 pt | o3 |
| AIME 2025 | 3.3% ↗matharena | 89.2% ↗matharena ⚠ | -85.9 pt | o3 |
| OTIS Mock AIME 2024-2025 (Epoch AI run) | 8.5% ↗epoch | 84.4% ↗epoch | -75.9 pt | o3 |
| Only Claude 3.5 Sonnet reports · 0 | ||||
| Claude 3.5 Sonnet reports nothing o3 does not. | ||||
| Only o3 reports · 3 | ||||
| FrontierMath Tiers 1-3 v2 (Epoch AI run) | not reported | 33.3% ↗epoch | — | — |
| SimpleQA Verified | not reported | 49.4% ↗epoch | — | — |
| SWE-bench Verified (Epoch AI run) | not reported | 62.3% ↗epoch | — | — |
Scores tagged "epoch" or "matharena" are independent runs, used only where the lab has not published its own; ⚠ marks rows MathArena flags as released after the competition. Higher is better on every row. Δ is Claude 3.5 Sonnet minus o3 in the benchmark's own unit. "Not reported" means the lab has not published that figure; it is not a zero. ↗ opens the source.
Specs & pricing
Side by side
Official pricing pages and model cards| Spec | Claude 3.5 Sonnet | o3 | Edge |
|---|---|---|---|
| Context window | 200K tokens | 200K tokens | Tie |
| Max output | 8K tokens | 100K tokens | o3 |
| Input price / 1M | $3 ↗ | $2 ↗ | o3 |
| Output price / 1M | $15 ↗ | $8 ↗ | o3 |
| Cached input / 1M | $0.3 ↗ | $0.5 ↗ | Claude 3.5 Sonnet |
| Input + output / 1M Lower is cheaper. List prices; batch, tool and regional fees excluded. | $18 | $10 | o3 |
| Modalities | text · vision | text · vision | Tie |
| Released | 2024-10-22 | 2025-04-16 | — |
| Cited benchmark scores | 4 | 7 | — |
Reliability
Provider status
Last 60 days · refreshed daily on this page · live on /statusMore matchups
Claude 3.5 Sonnet vs …
Models sharing the most benchmarksMore matchups
o3 vs …
Models sharing the most benchmarksBuilt by Respan
Which one wins on your data?
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