Data points: 95
The readout for Claude Opus 4.8 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
95 data points
Includes 8 benchmark rows, 2 audit samples, and 9 provider examples.
Selection signal
Start with GPT-5.4
The charts below split 19 high-signal samples across speed, scores, and audit health.
Model compare Claude Opus 4.8 vs GPT-5.4claude-opus-4-8-vs-gpt-5-4 | Model A Claude Opus 4.8 | 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 | Claude Opus 4.8 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 | 128K tokens | 128K tokens |
| Released | May 2026 | Mar 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 modeReasoning |
| Parameters | No data | No data |
| Tokenizer | Claude | GPT |
| Knowledge cutoff | No data | No data |
| OpenRouter ID | anthropic/claude-opus-4.8-fast | 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 Opus 4.8 | GPT-5.4 |
|---|---|---|
| HLE | 45.7%#2 | 41.6%#4 |
| GPQA | 92.0%#3 | 92.0%#3 |
| SciCode | 53.5%#7 | 56.6%#3 |
| Output speed | 60.1 tok/s#83 | 147.2 tok/s#32 |
| Input price | $5.00/M#41 | $2.50/M#37 |
| Output price | $25.00/M#47 | $15.00/M#44 |
| Blended price | $10.00/M#68 | $5.63/M#63 |
| Time to first answer token | 21.67 s#74 | 125.74 s#110 |
Latest completed audits from shared providers, with four safety and integrity score groups plus report links.
| Provider | Claude Opus 4.8 | GPT-5.4 |
|---|---|---|
速创APIWinner: Claude Opus 4.8 | Claude Opus 4.8 claude-opus-4-8 Audit score 100 100100100100 | GPT-5.4 gpt-5.4 No audit yet |
钠 APIWinner: GPT-5.4 | Claude Opus 4.8 claude-opus-4-8 Audit score 76 72727088 | GPT-5.4 gpt-5.4 Audit score 90 1008476100 |
Speed aggregates and input/output pricing share each provider row for real API selection and migration cost checks.
| Provider | Claude Opus 4.8 | GPT-5.4 |
|---|---|---|
6345ywz API15 tests | Claude Opus 4.8 speed / latency N/A / N/A input / output No data | GPT-5.4 speed / latency 41 tok/s / 6581ms input / output No data |
Fengsili API10 tests | Claude Opus 4.8 speed / latency N/A / N/A input / output No data | GPT-5.4 speed / latency 88 tok/s / 6075ms input / output No data |
Omini Api10 tests | Claude Opus 4.8 speed / latency N/A / N/A input / output No data | GPT-5.4 speed / latency 51 tok/s / 1443ms input / output No data |
Tokeness10 tests | Claude Opus 4.8 speed / latency 46 tok/s / 2538ms input / output No data | GPT-5.4 speed / latency 53 tok/s / 1112ms input / output No data |
180txt API5 tests | Claude Opus 4.8 claude-opus-4-8 speed / latency N/A / N/A input / output $73.00/M / $365.00/M | GPT-5.4 gpt-5.4-openai-compact speed / latency 39 tok/s / 3498ms input / output $0/M / $0/M |
Claude Opus 4.8 claude-opus-4-8 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 Opus 4.8 claude-opus-4-8 speed / latency No data input / output $5.00/M / $25.00/M | GPT-5.4 gpt-5.4-high speed / latency No data input / output $0.050/M / $0.050/M | |
Claude Opus 4.8 c/claude-opus-4-8 speed / latency No data input / output $0.080/M / $0.080/M | GPT-5.4 gpt-5.4-xhigh speed / latency No data input / output $2.50/M / $15.00/M | |
Claude Opus 4.8 claude-opus-4-8 speed / latency No data input / output $0.100/M / $0.500/M | GPT-5.4 gpt-5.4 speed / latency No data input / output $0.200/M / $1.20/M |
This report only uses LMSpeed data for Claude Opus 4.8 and GPT-5.4: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Guidance | Claude Opus 4.8 | GPT-5.4 |
|---|---|---|
| When to choose each model | Claude Opus 4.8 Claude Opus 4.8 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 95 verifiable data points, including pricing, speed, latency, benchmarks, and provider examples.
Continue from Claude Opus 4.8 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.
