Data points: 54
The readout for GPT-4o Transcribe Diarize and GPT-5.3 Codex, before the detailed comparison sheet.
Decision read
GPT-5.3 Codex
GPT-5.3 Codex currently has the stronger profile, with verified wins split 0 to 4.
Evidence depth
54 data points
Includes 0 benchmark rows, 0 audit samples, and 10 provider examples.
Selection signal
Start with GPT-5.3 Codex
The charts below split 10 high-signal samples across speed, scores, and audit health.
Model compare GPT-4o Transcribe Diarize vs GPT-5.3 Codexgpt-4o-transcribe-diarize-vs-gpt-5-3-codex | Model A GPT-4o Transcribe Diarize | Model B GPT-5.3 Codex |
|---|---|---|
| Overall leader | Contender | Leading |
| Verified metric wins | 0 wins | 4 wins |
| Where it leads | No data |
Third-party benchmark profile synced into LMSpeed; only metrics available for both models are shown.
| Metric | GPT-4o Transcribe Diarize | GPT-5.3 Codex |
|---|---|---|
| No shared benchmark metrics are available yet. | ||
Latest completed audits from shared providers, with four safety and integrity score groups plus report links.
| Provider | GPT-4o Transcribe Diarize | GPT-5.3 Codex |
|---|---|---|
| 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-4o Transcribe Diarize | GPT-5.3 Codex |
|---|---|---|
0 tests | GPT-4o Transcribe Diarize speed / latency N/A / N/A input / output No data |
This report only uses LMSpeed data for GPT-4o Transcribe Diarize and GPT-5.3 Codex: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Guidance | GPT-4o Transcribe Diarize | GPT-5.3 Codex |
|---|---|---|
| When to choose each model | GPT-4o Transcribe Diarize GPT-4o Transcribe Diarize does not clearly lead on the verified metrics here, so check provider-specific pricing before choosing. | GPT-5.3 Codex GPT-5.3 Codex is stronger when you prioritize Cheapest input price, Free providers, Provider coverage, Recent tests. |
TL;DR: GPT-5.3 Codex leads across 54 verifiable data points, including pricing, speed, latency, benchmarks, and provider examples.
Continue from GPT-4o Transcribe Diarize vs GPT-5.3 Codex into nearby model comparisons with enough verified LMSpeed data.
| Cheapest input price, Free providers, Provider coverage, Recent tests |
| Model metadata | No OpenRouter metadata is available yet for this model. | GPT-5.3 Codex exposes 400K tokens; notable signals: Text input, Image input, File input, Text output. |
|---|---|---|
| Developer | OpenAI | OpenAI |
| Context window | No data | 400K tokens |
| Max output | No data | 128K tokens |
| Released | No data | Feb 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-5.3-codex |
| References | No data | No data |
GPT-5.3 Codex
speed / latency
N/A / N/A
input / output
No data
AASS API0 tests | GPT-4o Transcribe Diarize speed / latency N/A / N/A input / output No data | GPT-5.3 Codex speed / latency N/A / N/A input / output No data |
|---|
AIsa0 tests | GPT-4o Transcribe Diarize speed / latency N/A / N/A input / output No data | GPT-5.3 Codex speed / latency N/A / N/A input / output No data |
|---|
AI发财网0 tests | GPT-4o Transcribe Diarize speed / latency N/A / N/A input / output No data | GPT-5.3 Codex speed / latency N/A / N/A input / output No data |
|---|
Cuz AI0 tests | GPT-4o Transcribe Diarize speed / latency N/A / N/A input / output No data | GPT-5.3 Codex speed / latency N/A / N/A input / output No data |
|---|
GPT-4o Transcribe Diarize gpt-4o-transcribe-diarize speed / latency No data input / output $0.103/M / $0.411/M | GPT-5.3 Codex gpt-5.3-codex-xhigh speed / latency No data input / output $0.072/M / $0.575/M |
GPT-4o Transcribe Diarize gpt-4o-transcribe-diarize speed / latency No data input / output $10.27/M / $41.10/M | GPT-5.3 Codex gpt-5.3-codex-medium speed / latency No data input / output $0.240/M / $1.92/M |
GPT-4o Transcribe Diarize gpt-4o-transcribe-diarize speed / latency No data input / output $10.27/M / $41.10/M | GPT-5.3 Codex gpt-5.3-codex-medium speed / latency No data input / output $0.240/M / $1.92/M |
GPT-4o Transcribe Diarize gpt-4o-transcribe-diarize speed / latency No data input / output $0.342/M / $1.37/M | GPT-5.3 Codex gpt-5.3-codex-2026-02-24 speed / latency No data input / output $10.27/M / $82.19/M |
GPT-4o Transcribe Diarize gpt-4o-transcribe-diarize speed / latency No data input / output $15.41/M / $61.64/M | GPT-5.3 Codex gpt-5.3-codex-medium speed / latency No data input / output $0.360/M / $2.88/M |
Rankings are based on community-submitted tests and periodic health probes. Advisory only, not official data.
