Data points: 56
The readout for Claude 3.5 Sonnet 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 1 to 5.
Evidence depth
56 data points
Includes 0 benchmark rows, 0 audit samples, and 10 provider examples.
Selection signal
Start with GPT-5.4
The charts below split 10 high-signal samples across speed, scores, and audit health.
Model compare Claude 3.5 Sonnet vs GPT-5.4claude-3-5-sonnet-vs-gpt-5-4 | Model A Claude 3.5 Sonnet | Model B GPT-5.4 |
|---|---|---|
| Overall leader | Contender | Leading |
| Verified metric wins | 1 wins | 5 wins |
| Where it leads | First-token latency | Cheapest input price, Average speed, Free providers, Provider coverage, Recent tests |
| Model metadata | No OpenRouter metadata is available yet for this model. | GPT-5.4 exposes 1.1M tokens; notable signals: Text input, Image input, File input, Text output. |
| Developer | Anthropic | OpenAI |
| Context window | No data | 1.1M tokens |
| Max output | No data | 128K tokens |
| Released | No data | Mar 2026 |
| Modalities | No data | Input TextImageFile Output Text |
| Features | None listed | Text inputImage inputFile inputText outputTool callingStructured outputsJSON modeReasoning |
| Parameters | No data | No data |
| Tokenizer | No data | GPT |
| Knowledge cutoff | No data | No data |
| OpenRouter ID | No data | 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 3.5 Sonnet | GPT-5.4 |
|---|---|---|
| No shared benchmark metrics are available yet. | ||
Latest completed audits from shared providers, with four safety and integrity score groups plus report links.
| Provider | Claude 3.5 Sonnet | 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 3.5 Sonnet | GPT-5.4 |
|---|---|---|
星见雅 API30 tests | Claude 3.5 Sonnet speed / latency 8 tok/s / 2740ms input / output No data | GPT-5.4 speed / latency 49 tok/s / 5435ms input / output No data |
丸美小沐5 tests | Claude 3.5 Sonnet speed / latency 39 tok/s / 4753ms input / output No data | GPT-5.4 speed / latency N/A / N/A input / output No data |
天絮 API5 tests | Claude 3.5 Sonnet speed / latency N/A / N/A input / output No data | GPT-5.4 speed / latency 46 tok/s / 3291ms input / output No data |
AASS API0 tests | Claude 3.5 Sonnet speed / latency N/A / N/A input / output No data | GPT-5.4 speed / latency N/A / N/A input / output No data |
AIGCBAR0 tests | Claude 3.5 Sonnet speed / latency N/A / N/A input / output No data | GPT-5.4 speed / latency N/A / N/A input / output No data |
Claude 3.5 Sonnet claude-3-5-sonnet-all speed / latency No data input / output $0.011/M / $0.011/M | GPT-5.4 gpt-5.4-2026-03-05 speed / latency No data input / output $0.342/M / $2.05/M | |
Claude 3.5 Sonnet claude-3-5-sonnet-all speed / latency No data input / output $0.011/M / $0.011/M | GPT-5.4 gpt-5.4-2026-03-05 speed / latency No data input / output $0.342/M / $2.05/M | |
Claude 3.5 Sonnet claude-3-5-sonnet-all speed / latency No data input / output $0.016/M / $0.016/M | GPT-5.4 gpt-5.4-2026-03-05 speed / latency No data input / output $0.514/M / $3.08/M | |
Claude 3.5 Sonnet claude-3.5-sonnet 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 | |
Claude 3.5 Sonnet claude-3-5-sonnet-all speed / latency No data input / output $0.080/M / $0.080/M | GPT-5.4 gpt-5.4-2026-03-05 speed / latency No data input / output $2.50/M / $15.00/M |
This report only uses LMSpeed data for Claude 3.5 Sonnet and GPT-5.4: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Guidance | Claude 3.5 Sonnet | GPT-5.4 |
|---|---|---|
| When to choose each model | Claude 3.5 Sonnet Claude 3.5 Sonnet is stronger when you prioritize First-token latency. | GPT-5.4 GPT-5.4 is stronger when you prioritize Cheapest input price, Average speed, Free providers, Provider coverage, Recent tests. |
TL;DR: GPT-5.4 leads across 56 verifiable data points, including pricing, speed, latency, benchmarks, and provider examples.
Continue from Claude 3.5 Sonnet 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.
