Model comparison
Claude Haiku 4.5 Thinking vs Claude Sonnet 4.5 Thinking
Head-to-head evidence from 2 shared benchmark results across 2 categories. Overall scores shown here use the public BenchAlign v5 ranking lane.
Evidence parity. Claude Haiku 4.5 Thinking and Claude Sonnet 4.5 Thinking share 2 comparable benchmark results. 0 of 8 categories are comparable. 0 results are unique to Claude Haiku 4.5 Thinking; 0 to Claude Sonnet 4.5 Thinking.
Updated July 23, 2026- Shared results
- 2
- Claude Haiku 4.5 Thinking only
- 0
- Claude Sonnet 4.5 Thinking only
- 0
- Comparable categories
- 0 / 8
Benchmark data for Claude Haiku 4.5 Thinking and Claude Sonnet 4.5 Thinking is coming soon on BenchLM.
Confidence note. This is a partial-evidence comparison with 2 shared benchmark results across 2 evidence categories; 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.
Category breakdown
Exact category averages are shown below. Not measured means BenchLM does not have enough sourced public coverage for that model and category.
Operational comparison
Runtime and commercial metrics are compared only when both models have a complete sourced value.
| Metric | Claude Haiku 4.5 Thinking | Claude Sonnet 4.5 Thinking | Comparison |
|---|---|---|---|
| Input / output priceUSD per 1M tokens | Claude Haiku 4.5 ThinkingNot available | Claude Sonnet 4.5 ThinkingNot available | A complete price comparison is not available. |
| Generation speedtokens per second | Claude Haiku 4.5 ThinkingNot available | Claude Sonnet 4.5 ThinkingNot available | A complete speed comparison is not available. |
| First-answer latencyseconds to first token | Claude Haiku 4.5 ThinkingNot available | Claude Sonnet 4.5 ThinkingNot available | A complete latency comparison is not available. |
| Context windowmaximum listed tokens | Claude Haiku 4.5 Thinking200K | Claude Sonnet 4.5 Thinking200K | Listed context windows are equal. |
Benchmark Deep Dive
Coding1 benchmarks
| Benchmark | Claude Haiku 4.5 Thinking | Claude Sonnet 4.5 Thinking | Result |
|---|---|---|---|
| Vibe Code BenchSource | 11.39% | 22.62% | Claude Sonnet 4.5 Thinking leads |
Multimodal1 benchmarks
| Benchmark | Claude Haiku 4.5 Thinking | Claude Sonnet 4.5 Thinking | Result |
|---|---|---|---|
| Design Arena WebsiteSource | 1152 | 1219 | Claude Sonnet 4.5 Thinking leads |
Frequently Asked Questions (2)
Can I compare Claude Haiku 4.5 Thinking and Claude Sonnet 4.5 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.
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