Data points: 60
Model compare
The readout for GPT-5.4 and Speech 2.8 Turbo, before the detailed comparison sheet.
Weighted outcome: GPT-5.4. Benchmark capability categories carry 80%, while price, API performance, and availability carry 20%.
Decision read
GPT-5.4
GPT-5.4 has the higher weighted result; Model A / B score 66.7 to 33.3.
Evidence depth
60 data points
Includes 0 benchmark rows, 0 audit samples, and 5 provider examples.
Selection signal
Start with GPT-5.4
The charts below split 5 high-signal samples across speed, scores, and audit health.
Switch either side of this report to compare another model with the same LMSpeed data pipeline.
Select a different model to open a new comparison URL.
This report only uses LMSpeed data for GPT-5.4 and Speech 2.8 Turbo: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Model compare | GPT-5.4 | Speech 2.8 Turbo |
|---|---|---|
| Overall leader | Leading | Contender |
| Weighted overall score | 66.7 pts | 33.3 pts |
| Benchmark category leads | 0 categories | 0 categories |
| Operational advantages | Free providers, Provider coverage | Cheapest input price |
| Context window | 1.1M tokens | No data |
| Max output | 128K tokens | No data |
| Modalities | Input TextImageFile Output Text |
The overall result weights benchmark capability categories at 80% and price, API speed/latency, and availability at 20%. Recent test volume does not affect the winner, and missing benchmark categories are excluded.
| Model compare | GPT-5.4 | Speech 2.8 Turbo |
|---|---|---|
| Developer | OpenAI | MiniMax |
| Released | Mar 2026 | Jul 2026 |
| Parameters | No data | No data |
| Tokenizer | GPT | Other |
| Knowledge cutoff | No data | No data |
| OpenRouter ID | openai/gpt-5.4 | minimax/speech-2.8-turbo |
| References | No data | No data |
This report only uses LMSpeed data for GPT-5.4 and Speech 2.8 Turbo: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
GPT-5.4
GPT-5.4 has these operational advantages: Free providers, Provider coverage.
Speech 2.8 Turbo
Speech 2.8 Turbo has these operational advantages: Cheapest input price.
Third-party benchmark profile synced into LMSpeed; only metrics available for both models are shown.
Compare benchmark category scores on a 0-100 scale. Select a category to inspect the gap.
Avg. score
GPT-5.4
57.6
Avg. score
Speech 2.8 Turbo
-
GPT-5.4
GPT-5.4
GPT-5.4
GPT-5.4
GPT-5.4
No data
GPT-5.4
GPT-5.4
Metric-level scores with benchmark source, rank depth, confidence, error, and evaluation date where available.
No shared professional benchmark scores are available yet.
Latest completed audits from shared providers, with four safety and integrity score groups plus report links.
| Provider | GPT-5.4 | Speech 2.8 Turbo |
|---|---|---|
| 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 | GPT-5.4 | Speech 2.8 Turbo |
|---|---|---|
0 tests | GPT-5.4 speed / latency N/A / N/A input / output No data | Speech 2.8 Turbo speed / latency N/A / N/A input / output No data |
0 tests | GPT-5.4 speed / latency N/A / N/A input / output No data | Speech 2.8 Turbo speed / latency N/A / N/A input / output No data |
0 tests | GPT-5.4 speed / latency N/A / N/A input / output No data | Speech 2.8 Turbo speed / latency N/A / N/A input / output No data |
0 tests | GPT-5.4 gpt-5.4 speed / latency N/A / N/A input / output $0.086/M/$0.514/M | Speech 2.8 Turbo speech-2.8-turbo speed / latency N/A / N/A input / output $0.011/request |
0 tests | GPT-5.4 speed / latency N/A / N/A input / output No data | Speech 2.8 Turbo speed / latency N/A / N/A input / output No data |
Weighted outcome: GPT-5.4. Benchmark capability categories carry 80%, while price, API performance, and availability carry 20%.
Input
Output
| Features | Text inputImage inputFile inputText outputTool callingStructured outputsJSON modeReasoning | Text inputSpeech output |
|---|
