OpenAI: GPT-5.3-Codex

openai/gpt-5.3-codex

Last Observed: 2026-10-15 06:03:58.511585 UTC

GPT-5.3-Codex is OpenAI’s most advanced agentic coding model, combining the frontier software engineering performance of GPT-5.2-Codex with the broader reasoning and professional knowledge capabilities of GPT-5.2. It achieves state-of-the-art results...

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Architecture And Modalities · 3

Architecture · Instruct Type API Details /architecture/instruct_type Explicit Null	Explicit Null
Architecture · Modality API Details /architecture/modality text+image+file->text	text+image+file->text
Architecture · Tokenizer API Details /architecture/tokenizer GPT	GPT

Benchmarks · 3

Benchmarks · Artificial Analysis · Agentic Index API Details /benchmarks/artificial_analysis/agentic_index Explicit Null	Explicit Null
Benchmarks · Artificial Analysis · Coding Index API Details /benchmarks/artificial_analysis/coding_index Explicit Null	Explicit Null
Benchmarks · Artificial Analysis · Intelligence Index API Details /benchmarks/artificial_analysis/intelligence_index 32.5	32.5

Catalog Identity And Metadata · 11

Canonical Slug API Details /canonical_slug openai/gpt-5.3-codex-20260224	openai/gpt-5.3-codex-20260224
Context Tokens API Details /context_length 400000	400,000
Created API Details /created 1771959164	2026-02-24 18:52:44 UTC
Description API Details /description GPT-5.3-Codex is OpenAI’s most advanced agentic coding model, combining the frontier software engineering performance of GPT-5.2-Codex with the broader reasoning and professional knowledge capabilities of GPT-5.2. It achieves state-of-the-art results...	GPT-5.3-Codex is OpenAI’s most advanced agentic coding model, combining the frontier software engineering performance of GPT-5.2-Codex with the broader reasoning and professional… GPT-5.3-Codex is OpenAI’s most advanced agentic coding model, combining the frontier software engineering performance of GPT-5.2-Codex with the broader reasoning and professional knowledge capabilities of GPT-5.2. It achieves state-of-the-art results...
Expiration Date API Details /expiration_date Explicit Null	Explicit Null
Hugging Face Id API Details /hugging_face_id Empty String	Empty String
Id API Details /id openai/gpt-5.3-codex	openai/gpt-5.3-codex
Knowledge Cutoff API Details /knowledge_cutoff Explicit Null	Explicit Null
Links · Details API Details /links/details /api/v1/models/openai/gpt-5.3-codex-20260224/endpoints	/api/v1/models/openai/gpt-5.3-codex-20260224/endpoints
Name API Details /name OpenAI: GPT-5.3-Codex	OpenAI: GPT-5.3-Codex
Supported Voices API Details /supported_voices Explicit Null	Explicit Null

Default Parameters · 6

Default Parameters · Frequency Penalty API Details /default_parameters/frequency_penalty Explicit Null	Explicit Null
Default Parameters · Presence Penalty API Details /default_parameters/presence_penalty Explicit Null	Explicit Null
Default Parameters · Repetition Penalty API Details /default_parameters/repetition_penalty Explicit Null	Explicit Null
Default Parameters · Temperature API Details /default_parameters/temperature Explicit Null	Explicit Null
Default Parameters · Top K API Details /default_parameters/top_k Explicit Null	Explicit Null
Default Parameters · Top P API Details /default_parameters/top_p Explicit Null	Explicit Null

Request Limits · 1

Per Request Limits API Details /per_request_limits Explicit Null	Explicit Null

Pricing · 4

Output Price · USD/Token API Details /pricing/completion 0.000014	0.000014
Pricing · Input Cache Read API Details /pricing/input_cache_read 0.000000175	0.000000175
Input Price · USD/Token API Details /pricing/prompt 0.00000175	0.00000175
Pricing · Web Search API Details /pricing/web_search 0.01	0.01

Reasoning · 2

Reasoning · Default Effort API Details /reasoning/default_effort medium	medium
Reasoning · Mandatory API Details /reasoning/mandatory False	False

Provider Limits · 3

Top Provider · Context Length API Details /top_provider/context_length 400000	400,000
Top Provider · Is Moderated API Details /top_provider/is_moderated True	True
Top Provider · Max Completion Tokens API Details /top_provider/max_completion_tokens 128000	128,000

API Structure And Container Types

Architecture API Details /architecture Object · See Fields	Object · See Fields
Architecture · Input Modalities API Details /architecture/input_modalities Array · See Items	Array · See Items
Architecture · Output Modalities API Details /architecture/output_modalities Array · See Items	Array · See Items
Benchmarks API Details /benchmarks Object · See Fields	Object · See Fields
Benchmarks · Artificial Analysis API Details /benchmarks/artificial_analysis Object · See Fields	Object · See Fields
Benchmarks · Design Arena API Details /benchmarks/design_arena Array · See Items	Array · See Items
Default Parameters API Details /default_parameters Object · See Fields	Object · See Fields
Links API Details /links Object · See Fields	Object · See Fields
Pricing API Details /pricing Object · See Fields	Object · See Fields
Reasoning API Details /reasoning Object · See Fields	Object · See Fields
Reasoning · Supported Efforts API Details /reasoning/supported_efforts Array · See Items	Array · See Items
Supported Parameters API Details /supported_parameters Array · See Items	Array · See Items
Top Provider API Details /top_provider Object · See Fields	Object · See Fields

Architecture · Input Modalities

3 items · source order preserved

text
image
file

API Details

Item	/architecture/input_modalities/*
1	text
2	image
3	file

Architecture · Output Modalities

1 items · source order preserved

text

API Details

Item	/architecture/output_modalities/*
1	text

Supported Parameters

11 items · source order preserved

include_reasoning
max_completion_tokens
max_tokens
reasoning
reasoning_effort
response_format
seed
structured_outputs
tool_choice
tools
verbosity

API Details

Item	/supported_parameters/*
1	include_reasoning
2	max_completion_tokens
3	max_tokens
4	reasoning
5	reasoning_effort
6	response_format
7	seed
8	structured_outputs
9	tool_choice
10	tools
11	verbosity

Benchmarks · Design Arena

13 items · source order preserved

Item	Arena	Category	Elo	Rank	Win Rate
1	agents	androidnative	1084	30	35.2
2	agents	fullstack	983	42	36.5
3	agents	godotgamedev	1124	27	45.1
4	agents	mobileapps	1051	44	41.4
5	agents	webapps	1026	40	36.9
6	models	3d	1008	108	35.3
7	models	asciiart	1154	41	51.2
8	models	codecategories	1146	85	47.2
9	models	dataviz	1165	72	50.6
10	models	gamedev	1164	68	51.3
11	models	svg	1127	54	54
12	models	uicomponent	1139	81	47.3
13	models	website	1164	80	48.6

API Details

Item	/benchmarks/design_arena/*/arena	/benchmarks/design_arena/*/category	/benchmarks/design_arena/*/elo	/benchmarks/design_arena/*/rank	/benchmarks/design_arena/*/win_rate
1	agents	androidnative	1084	30	35.2
2	agents	fullstack	983	42	36.5
3	agents	godotgamedev	1124	27	45.1
4	agents	mobileapps	1051	44	41.4
5	agents	webapps	1026	40	36.9
6	models	3d	1008	108	35.3
7	models	asciiart	1154	41	51.2
8	models	codecategories	1146	85	47.2
9	models	dataviz	1165	72	50.6
10	models	gamedev	1164	68	51.3
11	models	svg	1127	54	54
12	models	uicomponent	1139	81	47.3
13	models	website	1164	80	48.6

Reasoning · Supported Efforts

5 items · source order preserved

xhigh
high
medium
low
none

API Details

Item	/reasoning/supported_efforts/*
1	xhigh
2	high
3	medium
4	low
5	none

Recorded Value History

Historical API Field

Input Price · USD/Token

5 of 5 records plotted · 0 excluded for missing or invalid coordinates.

Up to 100 recorded versions, spaced by observation order rather than elapsed time. Array fields use the minimum numeric item in each version. Missing values are omitted. Select a point to open its archived snapshot; comparison actions use the current listing. History begins at the first recorded baseline.

Axis Scale

Select a point to open its listing or add it to compare.

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