Model comparison
Claude Sonnet 4.5 vs DeepSeek V3.2 (Thinking)
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 #96 (Estimated); DeepSeek V3.2 (Thinking) #65 (Estimated). Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.
Evidence parity. Claude Sonnet 4.5 and DeepSeek V3.2 (Thinking) share 1 comparable benchmark result. 0 of 8 categories are comparable. 11 results are unique to Claude Sonnet 4.5; 1 to DeepSeek V3.2 (Thinking).
Updated July 22, 2026- Shared results
- 1
- Claude Sonnet 4.5 only
- 11
- DeepSeek V3.2 (Thinking) only
- 1
- Comparable categories
- 0 / 8
Benchmark data for Claude Sonnet 4.5 and DeepSeek V3.2 (Thinking) 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.
Claude Sonnet 4.5 is priced at $3.00 input / $15.00 output per 1M tokens, versus $0.55 input / $2.19 output per 1M tokens for DeepSeek V3.2 (Thinking). Claude Sonnet 4.5 has the larger context window at 200K, compared with 128K for DeepSeek V3.2 (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 | Δ | DeepSeek V3.2 (Thinking) |
|---|---|---|---|
| Agentic | Claude Sonnet 4.555.4 | MarginNo overlap | DeepSeek V3.2 (Thinking)Not measured |
| Coding | Claude Sonnet 4.577.2 | MarginNo overlap | DeepSeek V3.2 (Thinking)Not measured |
| Reasoning | Claude Sonnet 4.513.6 | MarginNo overlap | DeepSeek V3.2 (Thinking)Not measured |
| Knowledge | Claude Sonnet 4.583.4 | MarginNo overlap | DeepSeek V3.2 (Thinking)Not measured |
| Math | Claude Sonnet 4.511.2 | MarginNo overlap | DeepSeek V3.2 (Thinking)Not measured |
Operational comparison
Runtime and commercial metrics are compared only when both models have a complete sourced value.
| Metric | Claude Sonnet 4.5 | DeepSeek V3.2 (Thinking) | Comparison |
|---|---|---|---|
| Input / output priceUSD per 1M tokens | Claude Sonnet 4.5$3 input / $15 output | DeepSeek V3.2 (Thinking)$0.55 input / $2.19 output | DeepSeek V3.2 (Thinking) has the lower combined listed price. |
| Generation speedtokens per second | Claude Sonnet 4.5Not available | DeepSeek V3.2 (Thinking)Not available | A complete speed comparison is not available. |
| First-answer latencyseconds to first token | Claude Sonnet 4.5Not available | DeepSeek V3.2 (Thinking)Not available | A complete latency comparison is not available. |
| Context windowmaximum listed tokens | Claude Sonnet 4.5200K | DeepSeek V3.2 (Thinking)128K | Claude Sonnet 4.5 lists the larger context window. |
Benchmark Deep Dive
Agentic5 benchmarks
Coding2 benchmarks
Reasoning1 benchmarks
| Benchmark | Claude Sonnet 4.5 | DeepSeek V3.2 (Thinking) | Result |
|---|---|---|---|
| ARC-AGI-2Source | 13.6% | — | Not comparable |
Knowledge1 benchmarks
| Benchmark | Claude Sonnet 4.5 | DeepSeek V3.2 (Thinking) | Result |
|---|---|---|---|
| GPQASource | 83.4% | — | Not comparable |
Math3 benchmarks
Multimodal1 benchmarks
| Benchmark | Claude Sonnet 4.5 | DeepSeek V3.2 (Thinking) | Result |
|---|---|---|---|
| Design Arena WebsiteSource | 1219 | 1204 | Claude Sonnet 4.5 leads |
Frequently Asked Questions (3)
Can I compare Claude Sonnet 4.5 and DeepSeek V3.2 (Thinking) 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 and DeepSeek V3.2 (Thinking) today?
Claude Sonnet 4.5: $3.00 input / $15.00 output per 1M tokens DeepSeek V3.2 (Thinking): $0.55 input / $2.19 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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