Model comparison
Claude Sonnet 4.5 Thinking vs DeepSeek V4 Pro
Head-to-head evidence from 1 shared benchmark result across 1 category. Overall scores shown here use the public BenchAlign v5 ranking lane.
Public leaderboard positions: Claude Sonnet 4.5 Thinking unranked (Not scored); DeepSeek V4 Pro #46 (Supported). Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.
Evidence parity. Claude Sonnet 4.5 Thinking and DeepSeek V4 Pro share 1 comparable benchmark result. 0 of 8 categories are comparable. 1 result is unique to Claude Sonnet 4.5 Thinking; 22 to DeepSeek V4 Pro.
Updated July 23, 2026- Shared results
- 1
- Claude Sonnet 4.5 Thinking only
- 1
- DeepSeek V4 Pro only
- 22
- Comparable categories
- 0 / 8
Benchmark data for Claude Sonnet 4.5 Thinking and DeepSeek V4 Pro is coming soon on BenchLM.
Confidence note. This is a partial-evidence comparison with 1 shared benchmark result across 1 evidence category; 0 of 8 categories currently have scoreable aggregates for both models. Treat the verdict as directional until coverage is more balanced.
Why this result
BenchLM has partial data for these models, but not enough overlapping benchmark coverage to produce a fair score-level comparison yet.
DeepSeek V4 Pro has the larger context window at 1M, compared with 200K for Claude Sonnet 4.5 Thinking.
Category breakdown
Exact category averages are shown below. Not measured means BenchLM does not have enough sourced public coverage for that model and category.
| Category | Claude Sonnet 4.5 Thinking | Δ | DeepSeek V4 Pro |
|---|---|---|---|
| Agentic | Claude Sonnet 4.5 ThinkingNot measured | MarginNo overlap | DeepSeek V4 Pro59.1 |
| Coding | Claude Sonnet 4.5 ThinkingNot measured | MarginNo overlap | DeepSeek V4 Pro65.3 |
| Knowledge | Claude Sonnet 4.5 ThinkingNot measured | MarginNo overlap | DeepSeek V4 Pro41.3 |
| Math | Claude Sonnet 4.5 ThinkingNot measured | MarginNo overlap | DeepSeek V4 Pro31.7 |
Operational comparison
Runtime and commercial metrics are compared only when both models have a complete sourced value.
| Metric | Claude Sonnet 4.5 Thinking | DeepSeek V4 Pro | Comparison |
|---|---|---|---|
| Input / output priceUSD per 1M tokens | Claude Sonnet 4.5 ThinkingNot available | DeepSeek V4 Pro$0.435 input / $0.87 output | A complete price comparison is not available. |
| Generation speedtokens per second | Claude Sonnet 4.5 ThinkingNot available | DeepSeek V4 ProNot available | A complete speed comparison is not available. |
| First-answer latencyseconds to first token | Claude Sonnet 4.5 ThinkingNot available | DeepSeek V4 ProNot available | A complete latency comparison is not available. |
| Context windowmaximum listed tokens | Claude Sonnet 4.5 Thinking200K | DeepSeek V4 Pro1M | DeepSeek V4 Pro lists the larger context window. |
Benchmark Deep Dive
Agentic6 benchmarks
Coding5 benchmarks
Reasoning2 benchmarks
Knowledge6 benchmarks
Math4 benchmarks
Multimodal1 benchmarks
| Benchmark | Claude Sonnet 4.5 Thinking | DeepSeek V4 Pro | Result |
|---|---|---|---|
| Design Arena WebsiteSource | 1219 | 1264 | DeepSeek V4 Pro leads |
Frequently Asked Questions (3)
Can I compare Claude Sonnet 4.5 Thinking and DeepSeek V4 Pro on BenchLM yet?
Not fully yet. BenchLM is tracking both models, but the sourced benchmark breakdown for this comparison is still coming soon.
Why does this comparison show “coming soon”?
BenchLM only shows category winners and benchmark-level calls when we have sourced results that can be compared fairly. For these models, the public benchmark coverage is not complete enough yet.
What data is available for Claude Sonnet 4.5 Thinking and DeepSeek V4 Pro today?
DeepSeek V4 Pro: $0.43 input / $0.87 output per 1M tokens Both model pages still include creator, context window, reasoning mode, and other metadata while benchmark coverage fills in.
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