DeepSeek
DeepSeek V4 Pro
$1.63 / 1M tokens
cheapest at DeepInfra · $1.30 in · $2.60 out
Wins 3 of 4
Head to head · prices updated Oct 31, 2026
DeepSeek V4 Pro vs Claude Sonnet 5.5
Claude Sonnet 5.5 costs 2.5× as much as DeepSeek V4 Pro at their cheapest providers (blended 3 input : 1 output tokens).
Anthropic Claude
Claude Sonnet 5.5
$4.00 / 1M tokens
cheapest at Anthropic · $2.00 in · $10.00 out
Wins 1 of 4
- Lower priceDeepSeek V4 Pro
- Higher accuracy (GPQA)Claude Sonnet 5.5
- Longer contextDeepSeek V4 Pro
- More providersDeepSeek V4 Pro
Verdict
DeepSeek V4 Pro is the better deal on price
Claude Sonnet 5.5 costs 2.5× as much as DeepSeek V4 Pro at their cheapest providers (blended 3 input : 1 output tokens).
Claude Sonnet 5.5 scores higher on GPQA Diamond: 95.6% (max reasoning) vs 90.9% (high reasoning).
So the choice is a trade-off: Claude Sonnet 5.5 for the hardest reasoning, DeepSeek V4 Pro when cost matters more than the last few points of accuracy.
DeepSeek V4 Pro accepts longer prompts (1049K vs 1000K tokens).
Your monthly bill
What would each cost you?
DeepSeek V4 Pro saves you $21.80 a month ($261.60 a year) for this workload.
Side by side
| DeepSeek V4 Pro | Claude Sonnet 5.5 | |
|---|---|---|
| Cheapest blended price / 1M | $1.63 | $4.00 |
| Input / output per 1M | $1.30 / $2.60 | $2.00 / $10.00 |
| Accuracy (GPQA Diamond) | 90.9% (high reasoning) | 95.6% (max reasoning) |
| Max context | 1M | 1M |
| Providers we track | 6 | 4 |
Standard list prices at each model's cheapest provider we track; blended = 3 input : 1 output tokens. GPQA Diamond from Epoch AI (CC BY 4.0), best measured reasoning setting, named next to each score. Methodology.
Where to buy each one
Questions people ask
Is DeepSeek V4 Pro cheaper than Claude Sonnet 5.5?
Claude Sonnet 5.5 costs 2.5× as much as DeepSeek V4 Pro at their cheapest providers (blended 3 input : 1 output tokens).
Which is more accurate, DeepSeek V4 Pro or Claude Sonnet 5.5?
On GPQA Diamond (graduate-level science questions, measured by Epoch AI) DeepSeek V4 Pro scores 90.9% (high reasoning) and Claude Sonnet 5.5 95.6% (max reasoning). One benchmark is not the whole picture; test both on your own prompts.
How much does DeepSeek V4 Pro cost per 1M tokens?
From $1.30 input and $2.60 output per 1M tokens at DeepInfra, the cheapest of 6 providers we track.
How much does Claude Sonnet 5.5 cost per 1M tokens?
From $2.00 input and $10.00 output per 1M tokens at Anthropic, the cheapest of 4 providers we track.
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