OpenAI model product
GPT-5.3-Codex
3-Codex is an OpenAI coding model with agentic coding capabilities, improvements in aesthetics, and context compaction.
Updated Sep 8, 2026. Default version: GPT-5.3 Codex
LLMBoard Score61.5GPT-5.3 Codex
Coverage0%6 benchmark families
Context window400KTokens
Official input price$1.75OpenAI API
GPT-5.3-Codex Capability Profile
This profile uses the model's current scored version. Arena ratings and prices are shown separately.
GPT-5.3-Codex Benchmark Results
Benchmark scores for GPT-5.3 Codex.
Sort by
Benchmark | Score | Rank | Participants | Percentile | Evidence | Evaluated |
|---|
| BenchmarkCybersecurity CTFs | Score77.60% | Rank01 | Participants3 | Percentile100.00% | EvidenceC | Evaluated |
| BenchmarkSWE-Lancer (IC-Diamond subset) | Score81.40% | Rank02 | Participants6 | Percentile80.00% | EvidenceC | Evaluated |
| BenchmarkTerminal-Bench 2.0 | Score77.30% | Rank04 | Participants51 | Percentile94.00% | EvidenceC | Evaluated |
| BenchmarkOSWorld-Verified | Score64.70% | Rank19 | Participants24 | Percentile21.74% | EvidenceC | Evaluated |
| BenchmarkLiveBench | Score72.76% | Rank23 | Participants38 | Percentile40.54% | EvidenceB | Evaluated |
| BenchmarkSWE-Bench Pro | Score56.80% | Rank30 | Participants55 | Percentile46.30% | EvidenceC | Evaluated |
| BenchmarkLM Arena Webdev | Score1,408.57 rating | Rank56 | Participants97 | Percentile42.71% | EvidenceA | Evaluated |
GPT-5.3-Codex Arena Results
Preference and agent-evaluation results for the default version.
Sort by
Arena | Category | Rank | Rating / score | Votes | Observations | Result date |
|---|
| Arenawebdev | Categoryimage to webdev | Rank26 | Rating / score1,444.27 | Votes2,539 | ObservationsN/A | Result date |
| Arenawebdev | Categorywebdev-react | Rank53 | Rating / score1,397.84 | Votes2,240 | ObservationsN/A | Result date |
| Arenawebdev | Categorywebdev-html | Rank54 | Rating / score1,426.87 | Votes374 | ObservationsN/A | Result date |
| Arenawebdev | Categoryoverall | Rank56 | Rating / score1,408.57 | Votes2,514 | ObservationsN/A | Result date |
| Arenawebdev | Categorywebdev | Rank56 | Rating / score1,408.57 | Votes2,514 | ObservationsN/A | Result date |
GPT-5.3-Codex Pricing
Official vendor API pricing appears first, followed by individual provider offers.
- Official API
- $1.75 input, $14 output per 1M
- Official provider
- OpenAI
- Lowest third-party
- From $1.6 input, $13 output per 1M via Poe
- Tracked offerings
- 28
Sort by
Provider | Provider model ID | Region | Input / 1M | Output / 1M | Context | Updated |
|---|
| ProviderPoe | Provider model IDopenai/gpt-5.3-codex | Regionglobal | Input / 1M$1.6 | Output / 1M$13 | Context400K | Updated |
| ProviderOrcaRouter | Provider model IDopenai/gpt-5.3-codex | Regionglobal | Input / 1M$1.75 | Output / 1M$14 | Context400K | Updated |
| ProviderNanoGPT | Provider model IDopenai/gpt-5.3-codex | Regionglobal | Input / 1M$1.75 | Output / 1M$14 | Context400K | Updated |
| ProviderImpossibl | Provider model IDopenai/gpt-5.3-codex | Regionglobal | Input / 1M$1.75 | Output / 1M$14 | Context400K | Updated |
| ProviderOpenRouter | Provider model IDopenai/gpt-5.3-codex | Regionglobal | Input / 1M$1.75 | Output / 1M$14 | Context400K | Updated |
| ProviderOpenAI | Provider model IDgpt-5.3-codex | Regionglobal | Input / 1M$1.75 | Output / 1M$14 | Context400K | Updated |
| ProviderOpper | Provider model IDopenai/gpt-5.3-codex | Regionglobal | Input / 1M$1.75 | Output / 1M$14 | Context400K | Updated |
| ProviderLLM Gateway | Provider model IDopenai/gpt-5.3-codex | Regionglobal | Input / 1M$1.75 | Output / 1M$14 | Context400K | Updated |
| ProviderVivgrid | Provider model IDgpt-5.3-codex | Regionglobal | Input / 1M$1.75 | Output / 1M$14 | Context400K | Updated |
| ProviderFastRouter | Provider model IDopenai/gpt-5.3-codex | Regionglobal | Input / 1M$1.75 | Output / 1M$14 | Context400K | Updated |
| ProviderZenMux | Provider model IDopenai/gpt-5.3-codex | Regionglobal | Input / 1M$1.75 | Output / 1M$14 | Context400K | Updated |
| ProviderFreeModel | Provider model IDgpt-5.3-codex | Regionglobal | Input / 1M$1.75 | Output / 1M$14 | Context400K | Updated |
| ProviderOfox | Provider model IDopenai/gpt-5.3-codex | Regionglobal | Input / 1M$1.75 | Output / 1M$14 | Context400K | Updated |
| ProviderNeon | Provider model IDgpt-5-3-codex | Regionglobal | Input / 1M$1.75 | Output / 1M$14 | Context400K | Updated |
| ProviderAzure Cognitive Services | Provider model IDgpt-5.3-codex | Regionglobal | Input / 1M$1.75 | Output / 1M$14 | Context400K | Updated |
| ProviderOpenCode Zen | Provider model IDgpt-5.3-codex | Regionglobal | Input / 1M$1.75 | Output / 1M$14 | Context400K | Updated |
| ProviderRequesty | Provider model IDgpt-5.3-codex | Regionglobal | Input / 1M$1.75 | Output / 1M$14 | Context400K | Updated |
| ProviderAzure | Provider model IDgpt-5.3-codex | Regionglobal | Input / 1M$1.75 | Output / 1M$14 | Context400K | Updated |
| ProviderFrogBot | Provider model IDgpt-5-3-codex | Regionglobal | Input / 1M$1.75 | Output / 1M$14 | Context400K | Updated |
| ProviderAIHubMix | Provider model IDgpt-5.3-codex | Regionglobal | Input / 1M$1.75 | Output / 1M$14 | Context400K | Updated |
| ProviderVercel AI Gateway | Provider model IDopenai/gpt-5.3-codex | Regionglobal | Input / 1M$1.75 | Output / 1M$14 | Context400K | Updated |
| ProviderEden AI | Provider model IDopenai/gpt-5.3-codex | Regionglobal | Input / 1M$1.75 | Output / 1M$14 | Context400K | Updated |
| ProviderDevPass (LLM Gateway) | Provider model IDgpt-5.3-codex | Regionglobal | Input / 1M$1.75 | Output / 1M$14 | Context400K | Updated |
| ProviderGitHub Copilot | Provider model IDgpt-5.3-codex | Regionglobal | Input / 1M$1.75 | Output / 1M$14 | Context400K | Updated |
| ProviderKilo Gateway | Provider model IDopenai/gpt-5.3-codex | Regionglobal | Input / 1M$1.75 | Output / 1M$14 | Context400K | Updated |
| ProviderPioneer | Provider model IDgpt-5.3-codex | Regionglobal | Input / 1M$1.75 | Output / 1M$14 | Context400K | Updated |
| ProviderAbacus | Provider model IDgpt-5.3-codex | Regionglobal | Input / 1M$1.75 | Output / 1M$14 | Context400K | Updated |
| ProviderVenice AI | Provider model IDopenai-gpt-53-codex | Regionglobal | Input / 1M$2.19 | Output / 1M$17.5 | Context400K | Updated |
GPT-5.3-Codex Runtime Performance
Provider-specific output speed and catalog latency for GPT-5.3 Codex. Runtime does not affect the capability score.
Sort by
Provider | Output Speed | Catalog Latency | Max Input | Max Output | Updated |
|---|
| ProviderOpenAI | Output Speed50.00 tok/s | Catalog Latency3.00 s | Max Input400K | Max Output128K | Updated |
Output Speed is generated output tokens received per second. Catalog latency is reported separately from observed provider TTFT.
GPT-5.3-Codex Specifications
Technical details for the model's default version.
- Version
- GPT-5.3 Codex
- Released
- Feb 5, 2026
- Knowledge cutoff
- Unknown
- Parameters
- N/A
- Context window
- 400K
- Max output
- 128K
- Inputs
- image, text
- Outputs
- text
- Open weights
- No
- License
- Proprietary
GPT-5.3-Codex Versions
Available versions of this model. The score column identifies the version used in the overall ranking.
Sort by
Version | Released | LLMBoard | Parameters | Context | Max output | Open weights | License |
|---|
| VersionGPT-5.3 Codex | Released | LLMBoard61.52 | ParametersN/A | Context400K | Max output128K | Open weightsNo | LicenseProprietary |
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What is GPT-5.3-Codex?
Key information about GPT-5.3-Codex and its available data.
3-Codex is an LLM from OpenAI designed for coding. It is available in the Codex app and API.
Data as of 2026-09-08.
FAQ
Common questions about GPT-5.3-Codex.
When was GPT-5.3-Codex released?
GPT-5.3-Codex's default version was released on Feb 5, 2026.
How much does GPT-5.3-Codex cost?
GPT-5.3-Codex's official API price is $1.75 per million input tokens and $14 per million output tokens via OpenAI. The lowest tracked third-party offer starts at $1.6 input and $13 output via Poe.
Who created GPT-5.3-Codex?
GPT-5.3-Codex was created by OpenAI.
What is the context window for GPT-5.3-Codex?
The default version has a 400K token context window.
Is GPT-5.3-Codex open weight?
No. The default version is not marked as having publicly available weights.
How many API providers offer GPT-5.3-Codex?
28 provider offerings are linked to the default version.