ModelBench
OpenAI logo
Models/OpenAI

GPT-5.3 Codex

Coding-optimized GPT model for repository edits, reviews, and agentic software work

Source-linked gpt-codex Closed weights Released 2026-02-05
API data Report
Input modalitiesT
Output modalitiesT
Input price$1.75/1M tokens
Output price$14/1M tokens
Context window400K
Max output128K
Overview

Capabilities and specifications

✓ Reasoning Yes
✓ Tool calling Yes
? Structured output Unknown
✓ Attachments Yes
✓ Vision input Yes
× Open weights No
Creator
OpenAI
Model family
gpt-codex
Knowledge cutoff
2025-08-31
License
Not documented
Release date
2026-02-05
Model ID
openai/gpt-5.3-codex
Inference availability

Provider pricing and availability

Provider-specific identifiers, limits, and prices per million tokens.

Report a price
Providers offering GPT-5.3 Codex
ProviderProvider model IDContextInputOutputCache readCapabilitiesSource
Poe openai/gpt-5.3-codex 400K $1.6 $13 $0.16 ReasoningTools Docs
Requesty openai/gpt-5.3-codex 400K $1.75 $14 $0.175 ReasoningToolsJSON Docs
Vercel AI Gateway openai/gpt-5.3-codex 400K $1.75 $14 $0.175 ReasoningToolsJSON Docs
Vivgrid gpt-5.3-codex 400K $1.75 $14 $0.175 ReasoningToolsJSON Docs
DigitalOcean openai-gpt-5.3-codex 400K $1.75 $14 $0.175 ReasoningToolsJSON Docs
ZenMux openai/gpt-5.3-codex 400K $1.75 $14 - ReasoningTools Docs
OpenAI gpt-5.3-codex 400K $1.75 $14 $0.175 ReasoningToolsJSON Docs
OrcaRouter openai/gpt-5.3-codex 400K $1.75 $14 $0.175 ReasoningToolsJSON Docs
Pioneer gpt-5.3-codex 400K $1.75 $14 $0.175 ReasoningToolsJSON Docs
LLM Gateway gpt-5.3-codex 400K $1.75 $14 $0.175 ReasoningToolsJSON Docs
Abacus gpt-5.3-codex 400K $1.75 $14 $0.18 ReasoningToolsJSON Docs
Cloudflare AI Gateway openai/gpt-5.3-codex 400K $1.75 $14 $0.175 ReasoningToolsJSON Docs
Azure gpt-5.3-codex 400K $1.75 $14 $0.175 ReasoningToolsJSON Docs
FreeModel gpt-5.3-codex 400K $1.75 $14 $0.175 ReasoningToolsJSON Docs
OpenCode Zen gpt-5.3-codex 400K $1.75 $14 $0.175 ReasoningToolsJSON Docs
Kilo Gateway openai/gpt-5.3-codex 400K $1.75 $14 - ReasoningTools Docs
OpenRouter openai/gpt-5.3-codex 400K $1.75 $14 $0.175 ReasoningToolsJSON Docs
FastRouter openai/gpt-5.3-codex 400K $1.75 $14 - ReasoningToolsJSON Docs
Azure Cognitive Services gpt-5.3-codex 400K $1.75 $14 $0.175 ReasoningToolsJSON Docs
AIHubMix gpt-5.3-codex 400K $1.75 $14 $0.175 ReasoningToolsJSON Docs
NanoGPT openai/gpt-5.3-codex 400K $1.75 $14 $0.175 ReasoningToolsJSON Docs
Neon gpt-5-3-codex 400K $1.75 $14 $0.175 ReasoningToolsJSON Docs
GitHub Copilot gpt-5.3-codex 400K $1.75 $14 $0.175 ReasoningToolsJSON Docs

Capability badges appear only when the provider catalog explicitly lists support.

Serving quality

Performance and reliability

Observed serving measurements stay separate from model specifications and are never estimated from price or model size.

Throughput Not reported

Generation speed; higher is faster.

Latency / TTFT Not reported

Time until the first output token arrives.

Uptime Not reported

Successful requests over a measured period.

Performance varies by inference provider, region, and load. Provider-level measurements appear only when a source reports them.

Published evaluations

Benchmarks

Raw results remain attached to their original source and version.

Benchmark registry
Design Arena: 3d - Unversioned - eloTop 8 reported models
Kimi K3
1456.0
Claude Opus 5
1384.0
Anthropic: Claude Fable 5 (batch)
1373.0
Claude Fable 5
1373.0
Z.ai: GLM 5.2
1366.0
Z.ai: GLM 5.1
1336.0
Anthropic: Claude Opus 4.6 (batch)
1332.0
GPT-5.3 Codex
1065.0
Design Arena: androidnative - Unversioned - eloTop 8 reported models
Anthropic: Claude Opus 4.8 (batch)
1337.0
Anthropic: Claude Opus 4.8
1337.0
Anthropic: Claude Fable 5 (batch)
1306.0
Claude Fable 5
1306.0
xAI: Grok 4.5
1280.0
Kimi K2.6
1278.0
Z.ai: GLM 5V Turbo
1267.0
GPT-5.3 Codex
1084.0
Design Arena: asciiart - Unversioned - eloTop 8 reported models
Anthropic: Claude Fable 5 (batch)
1364.0
Claude Fable 5
1364.0
Anthropic: Claude Opus 4.7 (batch)
1324.0
Anthropic: Claude Opus 4.7
1324.0
Muse Spark 1.1
1322.0
Google: Gemini 3.1 Pro Preview (batch)
1309.0
Gemini 3.1 Pro Preview
1309.0
GPT-5.3 Codex
1189.0
Design Arena: codecategories - Unversioned - eloTop 8 reported models
Kimi K3
1418.0
Claude Opus 5
1358.0
Z.ai: GLM 5.2
1346.0
Anthropic: Claude Fable 5 (batch)
1340.0
Claude Fable 5
1340.0
Anthropic: Claude Opus 4.6 (batch)
1324.0
Anthropic: Claude Opus 4.6
1324.0
GPT-5.3 Codex
1175.0
Design Arena: dataviz - Unversioned - eloTop 8 reported models
Kimi K3
1382.0
Claude Opus 5
1378.0
Z.ai: GLM 5.1
1366.0
Google: Gemini 3.6 Flash (batch)
1350.0
Gemini 3.6 Flash
1350.0
Anthropic: Claude Fable 5 (batch)
1349.0
Claude Fable 5
1349.0
GPT-5.3 Codex
1193.0
Design Arena: fullstack - Unversioned - eloTop 8 reported models
Anthropic: Claude Opus 4.7 (batch)
1503.0
Anthropic: Claude Opus 4.7
1503.0
Anthropic: Claude Fable 5 (batch)
1293.0
Claude Fable 5
1293.0
Anthropic: Claude Opus 4.8 (batch)
1289.0
Anthropic: Claude Opus 4.8
1289.0
xAI: Grok 4.5
1282.0
GPT-5.3 Codex
1023.0
Design Arena: gamedev - Unversioned - eloTop 8 reported models
Anthropic: Claude Fable 5 (batch)
1393.0
Claude Fable 5
1393.0
Z.ai: GLM 5.2
1358.0
Anthropic: Claude Sonnet 5 (batch)
1352.0
Claude Sonnet 5
1352.0
OpenAI: GPT-5.5 (batch)
1345.0
GPT-5.5
1345.0
GPT-5.3 Codex
1218.0
Design Arena: godotgamedev - Unversioned - eloTop 8 reported models
Anthropic: Claude Fable 5 (batch)
1349.0
Claude Fable 5
1349.0
Anthropic: Claude Opus 4.7 (batch)
1270.0
Anthropic: Claude Opus 4.7
1270.0
xAI: Grok 4.5
1270.0
Anthropic: Claude Sonnet 5 (batch)
1269.0
Claude Sonnet 5
1269.0
GPT-5.3 Codex
1124.0
Design Arena: mobileapps - Unversioned - eloTop 8 reported models
Anthropic: Claude Opus 4.6 (batch)
1275.0
Anthropic: Claude Opus 4.6
1275.0
Anthropic: Claude Opus 4.8 (batch)
1272.0
Anthropic: Claude Opus 4.8
1272.0
Anthropic: Claude Sonnet 4.6
1267.0
Anthropic: Claude Fable 5 (batch)
1265.0
Claude Fable 5
1265.0
GPT-5.3 Codex
1122.0
Design Arena: svg - Unversioned - eloTop 8 reported models
Anthropic: Claude Fable 5 (batch)
1351.0
Claude Fable 5
1351.0
Google: Gemini 3.1 Pro Preview (batch)
1335.0
Gemini 3.1 Pro Preview
1335.0
Google: Gemini 3.5 Flash (batch)
1296.0
Gemini 3.5 Flash
1296.0
Anthropic: Claude Opus 4.6 (batch)
1276.0
GPT-5.3 Codex
1177.0
Design Arena: uicomponent - Unversioned - eloTop 8 reported models
Kimi K3
1413.0
Claude Opus 5
1406.0
Anthropic: Claude Fable 5 (batch)
1350.0
Claude Fable 5
1350.0
Anthropic: Claude Opus 4.7 (batch)
1339.0
Anthropic: Claude Opus 4.7
1339.0
Z.ai: GLM 5.2
1334.0
GPT-5.3 Codex
1173.0
Design Arena: webapps - Unversioned - eloTop 8 reported models
Kimi K3
1329.0
Anthropic: Claude Fable 5 (batch)
1305.0
Claude Fable 5
1305.0
Anthropic: Claude Sonnet 5 (batch)
1304.0
Claude Sonnet 5
1304.0
Anthropic: Claude Opus 4.7 (batch)
1303.0
Anthropic: Claude Opus 4.7
1303.0
GPT-5.3 Codex
1098.0
Design Arena: website - Unversioned - eloTop 8 reported models
Kimi K3
1375.0
Claude Opus 5
1343.0
Z.ai: GLM 5.2
1340.0
Anthropic: Claude Fable 5 (batch)
1323.0
Claude Fable 5
1323.0
xAI: Grok 4.5
1323.0
Google: Gemini 3.6 Flash (batch)
1322.0
GPT-5.3 Codex
1187.0
SWE-Atlas Codebase QnA - Unversioned - score - CodexTop 3 reported models
GPT-5.5
45.4
GPT-5.4
40.8
GPT-5.3 Codex
32.6
SWE-Atlas Refactoring - Unversioned - score - CodexTop 3 reported models
GPT-5.5
44.8
GPT-5.4
44.3
GPT-5.3 Codex
42.4
SWE-Atlas Test Writing - Unversioned - score - CodexTop 2 reported models
GPT-5.5
42.6
GPT-5.3 Codex
39.0
Catalog activity

Recent record changes

Detected changes from successful source imports.

Full change log
No recent changes detected

This record has not changed in the retained import history.

Public API

Use this record

Fetch the complete source-linked model record without an API key.

API documentation
Endpoint
GET https://www.modelbench.lol/api/v1/models/openai/gpt-5.3-codex
curl
curl "https://www.modelbench.lol/api/v1/models/openai/gpt-5.3-codex"