Compare / head-to-head
Claude Sonnet 4.5vsDeepSeek V4 Pro
DeepSeek V4 Pro leads 6 of 7 shared benchmarks. DeepSeek V4 Pro is 13.8x cheaper per token. DeepSeek V4 Pro has the larger context window (1M tokens).
Benchmarks from cited public sources; pricing from official pages; status from official provider feeds.
Shared benchmarks
0 – 6
DeepSeek V4 Pro leads · 1 tied
Cheaper per token
DeepSeek V4 Pro
13.8x cheaper, input + output
Larger context
DeepSeek V4 Pro
1M tokens
Provider uptime (30d)
100% · 100%
Anthropic · DeepSeek
Claude Sonnet 4.5
Anthropic · released 2025-09-29
textvision
DeepSeek V4 Pro
DeepSeek · released 2026-08-13
text
Quality
Benchmark matrix
7 shared · 13 only Claude Sonnet 4.5 · 4 only DeepSeek V4 Pro| Benchmark | Claude Sonnet 4.5 | DeepSeek V4 Pro | Δ | Edge |
|---|---|---|---|---|
| Reported by both · 7 | ||||
| GPQA Diamond | 83.4% ↗ | 90.9% ↗epoch | -7.5 pt | DeepSeek V4 Pro |
| FrontierMath Tier 4 v2 (Epoch AI run) | 2.4% ↗epoch | 2.4% ↗epoch | 0 | Tie |
| FrontierMath Tiers 1-3 v2 (Epoch AI run) | 23.9% ↗epoch | 45.3% ↗epoch | -21.4 pt | DeepSeek V4 Pro |
| Humanity's Last Exam (with tools) | 33.6% ↗ | 60% ↗ | -26.4 pt | DeepSeek V4 Pro |
| OTIS Mock AIME 2024-2025 (Epoch AI run) | 77.8% ↗epoch | 96.7% ↗epoch | -18.9 pt | DeepSeek V4 Pro |
| SimpleQA Verified | 30.7% ↗epoch | 47% ↗epoch | -16.3 pt | DeepSeek V4 Pro |
| SWE-bench Verified (Epoch AI run) | 71.3% ↗epoch | 77.6% ↗epoch | -6.3 pt | DeepSeek V4 Pro |
| Only Claude Sonnet 4.5 reports · 13 | ||||
| SWE-bench Verified | 77.2% ↗ | not reported | — | — |
| AIME 2025 | 84.2% ↗matharena ⚠ | not reported | — | — |
| Humanity's Last Exam (no tools) | 17.7% ↗ | not reported | — | — |
| ARC-AGI-2 (Verified) | 13.6% ↗ | not reported | — | — |
| GDPval-AA | 1276 ↗ | not reported | — | — |
| MCP Atlas | 43.8% ↗ | not reported | — | — |
| MMMLU | 89.5% ↗ | not reported | — | — |
| MMMU-Pro (no tools) | 63.4% ↗ | not reported | — | — |
| MMMU-Pro (with tools) | 68.9% ↗ | not reported | — | — |
| OSWorld-Verified | 61.4% ↗ | not reported | — | — |
| Tau2-bench Retail | 86.2% ↗ | not reported | — | — |
| Tau2-bench Telecom | 98% ↗ | not reported | — | — |
| Terminal-Bench 2.0 | 51% ↗ | not reported | — | — |
| Only DeepSeek V4 Pro reports · 4 | ||||
| AIME 2026 | not reported | 96.7% ↗matharena ⚠ | — | — |
| LMArena Elo | not reported | 1450.6 ↗ | — | — |
| DeepSWE v1.1 | not reported | 62.7% ↗ | — | — |
| Terminal-Bench 2.1 | not reported | 87.9% ↗ | — | — |
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 Sonnet 4.5 minus DeepSeek V4 Pro 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 Sonnet 4.5 | DeepSeek V4 Pro | Edge |
|---|---|---|---|
| Context window | 200K tokens | 1M tokens | DeepSeek V4 Pro |
| Max output | 64K tokens | 384K tokens | DeepSeek V4 Pro |
| Input price / 1M | $3 ↗ | $0.435 ↗ | DeepSeek V4 Pro |
| Output price / 1M | $15 ↗ | $0.87 ↗ | DeepSeek V4 Pro |
| Cached input / 1M | $0.3 ↗ | $0.004 ↗ | DeepSeek V4 Pro |
| Input + output / 1M Lower is cheaper. List prices; batch, tool and regional fees excluded. | $18 | $1.31 | DeepSeek V4 Pro |
| Modalities | text · vision | text | Claude Sonnet 4.5 |
| Released | 2025-09-29 | 2026-08-13 | — |
| Cited benchmark scores | 21 | 11 | — |
Reliability
Provider status
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