Data points: 115
The readout for Claude Haiku 4.5 and Claude Sonnet 4.6, before the detailed comparison sheet.
Decision read
Claude Haiku 4.5
Claude Haiku 4.5 currently has the stronger profile, with verified wins split 3 to 2.
Evidence depth
115 data points
Includes 8 benchmark rows, 6 audit samples, and 9 provider examples.
Selection signal
Start with Claude Haiku 4.5
The charts below split 23 high-signal samples across speed, scores, and audit health.
Model compare Claude Haiku 4.5 vs Claude Sonnet 4.6claude-haiku-4-5-vs-claude-sonnet-4-6 | Model A Claude Haiku 4.5 | Model B Claude Sonnet 4.6 |
|---|---|---|
| Overall leader | Leading | Contender |
| Verified metric wins | 3 wins | 2 wins |
| Where it leads | Cheapest input price, Average speed, First-token latency |
Third-party benchmark profile synced into LMSpeed; only metrics available for both models are shown.
| Metric | Claude Haiku 4.5 | Claude Sonnet 4.6 |
|---|---|---|
| SciCode | 34.4%#78 |
Latest completed audits from shared providers, with four safety and integrity score groups plus report links.
| Provider | Claude Haiku 4.5 | Claude Sonnet 4.6 |
|---|---|---|
Winner: Claude Sonnet 4.6 | Claude Haiku 4.5 claude-haiku-4-5-20251001 No audit yet | Claude Sonnet 4.6 claude-sonnet-4-6 |
Speed aggregates and input/output pricing share each provider row for real API selection and migration cost checks.
| Provider | Claude Haiku 4.5 | Claude Sonnet 4.6 |
|---|---|---|
30 tests | Claude Haiku 4.5 speed / latency 97 tok/s / 1336ms input / output No data |
This report only uses LMSpeed data for Claude Haiku 4.5 and Claude Sonnet 4.6: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Guidance | Claude Haiku 4.5 | Claude Sonnet 4.6 |
|---|---|---|
| When to choose each model | Claude Haiku 4.5 Claude Haiku 4.5 is stronger when you prioritize Cheapest input price, Average speed, First-token latency. | Claude Sonnet 4.6 Claude Sonnet 4.6 is stronger when you prioritize Provider coverage, Recent tests. |
TL;DR: Claude Haiku 4.5 leads across 115 verifiable data points, including pricing, speed, latency, benchmarks, and provider examples.
Continue from Claude Haiku 4.5 vs Claude Sonnet 4.6 into nearby model comparisons with enough verified LMSpeed data.
| Provider coverage, Recent tests |
| Model metadata | Claude Haiku 4.5 exposes 200K tokens; notable signals: Text input, Image input, File input, Text output. | Claude Sonnet 4.6 exposes 1M tokens; notable signals: Text input, Image input, File input, Text output. |
|---|---|---|
| Developer | Anthropic | Anthropic |
| Context window | 200K tokens | 1M tokens |
| Max output | 64K tokens | 128K tokens |
| Released | Oct 2025 | Feb 2026 |
| Modalities | Input TextImageFile Output Text | Input TextImageFile Output Text |
| Features | Text inputImage inputFile inputText outputTool callingStructured outputsJSON modeReasoning | Text inputImage inputFile inputText outputTool callingStructured outputsJSON mode |
| Parameters | No data | No data |
| Tokenizer | Claude | Claude |
| Knowledge cutoff | No data | No data |
| OpenRouter ID | anthropic/claude-haiku-4.5 | anthropic/claude-sonnet-4.6 |
| References | No data | No data |
| Time to first answer token | 0.90 s#22 | 1.28 s#30 |
|---|
| Input price | $1.00/M#26 | $3.00/M#39 |
|---|
| Time to first token | 0.90 s#32 | 1.28 s#51 |
|---|
| Output price | $5.00/M#37 | $15.00/M#44 |
|---|
| Output speed | 103.5 tok/s#48 | 47.0 tok/s#94 |
|---|
| Blended price | $2.00/M#51 | $6.00/M#65 |
|---|
| GPQA | 64.6%#96 | 79.9%#58 |
|---|
Audit score
91
TokenessWinner: Claude Haiku 4.5 | Claude Haiku 4.5 claude-haiku-4-5 Audit score 91 7610086100 | Claude Sonnet 4.6 claude-sonnet-4-6 Audit score 82 598484100 |
|---|
ApiToken OnlineWinner: Claude Sonnet 4.6 | Claude Haiku 4.5 claude-haiku-4-5-20251001 No audit yet | Claude Sonnet 4.6 claude-sonnet-4-6 Audit score 84 6968100100 |
|---|
VSLLMWinner: Claude Sonnet 4.6 | Claude Haiku 4.5 claude-haiku-4-5-20251001 No audit yet | Claude Sonnet 4.6 claude-sonnet-4-6 Audit score 82 727580100 |
|---|
小水管 APIWinner: Claude Sonnet 4.6 | Claude Haiku 4.5 claude-haiku-4-5-20251001 No audit yet | Claude Sonnet 4.6 claude-sonnet-4-6 Audit score 82 5375100100 |
|---|
PackyAPIWinner: Claude Sonnet 4.6 | Claude Haiku 4.5 claude-haiku-4-5-20251001 No audit yet | Claude Sonnet 4.6 claude-sonnet-4-6 Audit score 81 727280100 |
|---|
Claude Sonnet 4.6
speed / latency
32 tok/s / 6074ms
input / output
No data
天宫造物25 tests | Claude Haiku 4.5 speed / latency N/A / N/A input / output No data | Claude Sonnet 4.6 speed / latency 40 tok/s / 3145ms input / output No data |
|---|
N1N20 tests | Claude Haiku 4.5 speed / latency 112 tok/s / 1733ms input / output No data | Claude Sonnet 4.6 speed / latency 55 tok/s / 2094ms input / output No data |
|---|
小水管 API15 tests | Claude Haiku 4.5 claude-haiku-4-5-20251001 speed / latency 139 tok/s / 12443ms input / output $0/M / $0/M | Claude Sonnet 4.6 claude-sonnet-4-6 speed / latency 31 tok/s / 4124ms input / output $0/M / $0/M |
|---|
Fangyuan API10 tests | Claude Haiku 4.5 speed / latency 88 tok/s / 2243ms input / output No data | Claude Sonnet 4.6 speed / latency N/A / N/A input / output No data |
|---|
Claude Haiku 4.5 claude-haiku-4.5 speed / latency No data input / output $0/M / $0/M | Claude Sonnet 4.6 claude-sonnet-4-6 speed / latency No data input / output $3.00/M / $15.00/M |
Claude Haiku 4.5 claude-haiku-4-5-20251001 speed / latency No data input / output $0/M / $0/M | Claude Sonnet 4.6 claude-sonnet-4-6 speed / latency No data input / output $0/M / $0/M |
Claude Haiku 4.5 claude-haiku-4-5-20251001 speed / latency No data input / output $0.0003/M / $0.0014/M | Claude Sonnet 4.6 claude-sonnet-4-6 speed / latency No data input / output $0.0008/M / $0.0041/M |
Claude Haiku 4.5 claude-haiku-4-5-20251001 speed / latency No data input / output $0.0068/M / $0.034/M | Claude Sonnet 4.6 claude-sonnet-4-6 speed / latency No data input / output $0.021/M / $0.103/M |
Rankings are based on community-submitted tests and periodic health probes. Advisory only, not official data.
