Data points: 81
The readout for Claude Sonnet 4 and GPT-5.4, before the detailed comparison sheet.
Decision read
GPT-5.4
GPT-5.4 currently has the stronger profile, with verified wins split 0 to 6.
Evidence depth
81 data points
Includes 8 benchmark rows, 0 audit samples, and 10 provider examples.
Selection signal
Start with GPT-5.4
The charts below split 18 high-signal samples across speed, scores, and audit health.
Model compare Claude Sonnet 4 vs GPT-5.4claude-sonnet-4-vs-gpt-5-4 | Model A Claude Sonnet 4 | Model B GPT-5.4 |
|---|---|---|
| Overall leader | Contender | Leading |
| Verified metric wins | 0 wins | 6 wins |
| Where it leads | No data | Cheapest input price, Average speed, First-token latency, Free providers, Provider coverage, Recent tests |
| Model metadata | Claude Sonnet 4 exposes 1M tokens; notable signals: Text input, Image input, File input, Text output. | GPT-5.4 exposes 1.1M tokens; notable signals: Text input, Image input, File input, Text output. |
| Developer | Anthropic | OpenAI |
| Context window | 1M tokens | 1.1M tokens |
| Max output | 64K tokens | 128K tokens |
| Released | May 2025 | Mar 2026 |
| Modalities | Input ImageTextFile Output Text | Input TextImageFile Output Text |
| Features | Text inputImage inputFile inputText outputTool callingReasoning | Text inputImage inputFile inputText outputTool callingStructured outputsJSON modeReasoning |
| Parameters | No data | No data |
| Tokenizer | Claude | GPT |
| Knowledge cutoff | 2025-01-31 | No data |
| OpenRouter ID | anthropic/claude-sonnet-4 | openai/gpt-5.4 |
| References | No data | No data |
Third-party benchmark profile synced into LMSpeed; only metrics available for both models are shown.
| Metric | Claude Sonnet 4 | GPT-5.4 |
|---|---|---|
| GPQA | 68.3%#83 | 92.0%#3 |
| SciCode | 37.3%#64 | 56.6%#3 |
| HLE | 4.0%#95 | 41.6%#4 |
| Time to first answer token | 1.07 s#24 | 134.24 s#111 |
| Input price | $3.00/M#39 | $2.50/M#37 |
| Time to first token | 1.07 s#39 | 134.24 s#110 |
| Output price | $15.00/M#44 | $15.00/M#44 |
| Output speed | 49.5 tok/s#90 | 92.4 tok/s#56 |
Latest completed audits from shared providers, with four safety and integrity score groups plus report links.
| Provider | Claude Sonnet 4 | GPT-5.4 |
|---|---|---|
| No completed audits are available from shared providers yet. | ||
Speed aggregates and input/output pricing share each provider row for real API selection and migration cost checks.
| Provider | Claude Sonnet 4 | GPT-5.4 |
|---|---|---|
天宫造物50 tests | Claude Sonnet 4 speed / latency N/A / N/A input / output No data | GPT-5.4 speed / latency 50 tok/s / 7305ms input / output No data |
6345ywz API15 tests | Claude Sonnet 4 speed / latency N/A / N/A input / output No data | GPT-5.4 speed / latency 41 tok/s / 6581ms input / output No data |
hibestoic15 tests | Claude Sonnet 4 speed / latency N/A / N/A input / output No data | GPT-5.4 speed / latency 62 tok/s / 3351ms input / output No data |
鲨鱼魔法15 tests | Claude Sonnet 4 speed / latency 36 tok/s / 6227ms input / output No data | GPT-5.4 speed / latency N/A / N/A input / output No data |
Completions10 tests | Claude Sonnet 4 speed / latency 27 tok/s / 1036ms input / output No data | GPT-5.4 speed / latency 36 tok/s / 557ms input / output No data |
Claude Sonnet 4 claude-sonnet-4-20250514 speed / latency No data input / output $43.80/M / $219.00/M | GPT-5.4 gpt-5.4-openai-compact speed / latency No data input / output $0/M / $0/M | |
Claude Sonnet 4 claude-sonnet-4 speed / latency No data input / output $0.0010/M / $0.0010/M | GPT-5.4 gpt-5.4-openai-compact speed / latency No data input / output $75.00/M / $450.00/M | |
Claude Sonnet 4 claude-sonnet-4 speed / latency No data input / output $3.00/M / $15.00/M | GPT-5.4 gpt-5.4 speed / latency No data input / output $0.010/M / $0.010/M | |
Claude Sonnet 4 claude-sonnet-4 speed / latency No data input / output $0.040/M / $0.200/M | GPT-5.4 gpt-5.4 speed / latency No data input / output $0.020/M / $0.120/M | |
Claude Sonnet 4 claude-sonnet-4-20250514 speed / latency No data input / output $0.041/M / $0.205/M | GPT-5.4 gpt-5.4-xhigh speed / latency No data input / output $0.034/M / $0.205/M |
This report only uses LMSpeed data for Claude Sonnet 4 and GPT-5.4: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Guidance | Claude Sonnet 4 | GPT-5.4 |
|---|---|---|
| When to choose each model | Claude Sonnet 4 Claude Sonnet 4 does not clearly lead on the verified metrics here, so check provider-specific pricing before choosing. | GPT-5.4 GPT-5.4 is stronger when you prioritize Cheapest input price, Average speed, First-token latency, Free providers, Provider coverage, Recent tests. |
TL;DR: GPT-5.4 leads across 81 verifiable data points, including pricing, speed, latency, benchmarks, and provider examples.
Continue from Claude Sonnet 4 vs GPT-5.4 into nearby model comparisons with enough verified LMSpeed data.
Rankings are based on community-submitted tests and periodic health probes. Advisory only, not official data.
