Model comparison
Claude 3 Haiku vs Claude Sonnet 4.5
Head-to-head evidence from 0 shared benchmark results across 0 categories. Overall scores shown here use the public BenchAlign v5 ranking lane.
Public leaderboard positions: Claude 3 Haiku #194 (Supported); Claude Sonnet 4.5 #96 (Estimated). Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.
Evidence parity. Claude 3 Haiku and Claude Sonnet 4.5 share 0 comparable benchmark results. 0 of 8 categories are comparable. 12 results are unique to Claude 3 Haiku; 12 to Claude Sonnet 4.5.
Updated July 22, 2026- Shared results
- 0
- Claude 3 Haiku only
- 12
- Claude Sonnet 4.5 only
- 12
- Comparable categories
- 0 / 8
Benchmark data for Claude 3 Haiku and Claude Sonnet 4.5 is coming soon on BenchLM.
Confidence note. This is a partial-evidence comparison with 0 shared benchmark results across 0 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.
Claude Sonnet 4.5 is priced at $3.00 input / $15.00 output per 1M tokens, versus $0.25 input / $1.25 output per 1M tokens for Claude 3 Haiku.
Operational comparison
Runtime and commercial metrics are compared only when both models have a complete sourced value.
| Metric | Claude 3 Haiku | Claude Sonnet 4.5 | Comparison |
|---|---|---|---|
| Input / output priceUSD per 1M tokens | Claude 3 Haiku$0.25 input / $1.25 output | Claude Sonnet 4.5$3 input / $15 output | Claude 3 Haiku has the lower combined listed price. |
| Generation speedtokens per second | Claude 3 Haiku138 tok/s | Claude Sonnet 4.5Not available | A complete speed comparison is not available. |
| First-answer latencyseconds to first token | Claude 3 Haiku1.16 s | Claude Sonnet 4.5Not available | A complete latency comparison is not available. |
| Context windowmaximum listed tokens | Claude 3 Haiku200K | Claude Sonnet 4.5200K | Listed context windows are equal. |
Benchmark Deep Dive
Agentic6 benchmarks
Coding2 benchmarks
Reasoning3 benchmarks
Knowledge7 benchmarks
| Benchmark | Claude 3 Haiku | Claude Sonnet 4.5 | Result |
|---|---|---|---|
| Artificial Analysis Intelligence IndexSource | 3.9% | — | Not comparable |
| AA-GPQA DiamondSource | 37.4% | — | Not comparable |
| AA-HLESource | 3.9% | — | Not comparable |
| AA-Omniscience IndexSource | -47.6% | — | Not comparable |
| AA-Omniscience AccuracySource | 17.2% | — | Not comparable |
| AA-Omniscience Hallucination RateSource | 78.2% | — | Not comparable |
| GPQASource | — | 83.4% | Not comparable |
Math3 benchmarks
Multimodal2 benchmarks
Inst. Following1 benchmarks
| Benchmark | Claude 3 Haiku | Claude Sonnet 4.5 | Result |
|---|---|---|---|
| AA-IFBenchSource | 36.1% | — | Not comparable |
Frequently Asked Questions (3)
Can I compare Claude 3 Haiku and Claude Sonnet 4.5 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 3 Haiku and Claude Sonnet 4.5 today?
Claude 3 Haiku: $0.25 input / $1.25 output per 1M tokens Claude Sonnet 4.5: $3.00 input / $15.00 output per 1M tokens Both model pages still include creator, context window, reasoning mode, and other metadata while benchmark coverage fills in.
Related Comparisons
Choose a model with this week’s evidence
Join 2,000+ readers for ranking moves, pricing changes, and the claims that still need proof.
One email each week. Unsubscribe anytime.