Catalog Changes · 2026-10-14 18:04:42.664973

OpenAI: GPT-5.5 · 2026-10-14 18:04:42.664973 UTC

OpenRouter

13 Changed Fields

Field / Array Position	Previous Value	Observed Value
Benchmarks · Design Arena[13] · Elo	1198	1196
Benchmarks · Design Arena[13] · Rank	48	49
Benchmarks · Design Arena[15] · Elo	1263	1262
Benchmarks · Design Arena[15] · Rank	34	35
Benchmarks · Design Arena[15] · Win Rate	53.2	53.1
Benchmarks · Design Arena[16] · Win Rate	55.8	55.7
Benchmarks · Design Arena[17] · Elo	1299	1297
Benchmarks · Design Arena[17] · Rank	19	20
Benchmarks · Design Arena[18] · Elo	1234	1235
Benchmarks · Design Arena[19] · Win Rate	53.4	53.3
Benchmarks · Design Arena[20] · Elo	1259	1258
Benchmarks · Design Arena[20] · Rank	38	39
Benchmarks · Design Arena[20] · Win Rate	52.4	52.3

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OpenAI: GPT-5.5

openai/gpt-5.5

OpenRouter Catalog Changes

Last Observed: 2026-10-15 00:04:07.421032 UTC

GPT-5.5 is OpenAI’s frontier model designed for complex professional workloads, building on GPT-5.4 with stronger reasoning, higher reliability, and improved token efficiency on hard tasks. It features a 1M+ token...

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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 36.4	36.4
Benchmarks · Artificial Analysis · Coding Index API Details /benchmarks/artificial_analysis/coding_index 74.9	74.9
Benchmarks · Artificial Analysis · Intelligence Index API Details /benchmarks/artificial_analysis/intelligence_index 38.4	38.4

Catalog Identity And Metadata · 11

Canonical Slug API Details /canonical_slug openai/gpt-5.5-20260423	openai/gpt-5.5-20260423
Context Tokens API Details /context_length 1050000	1,050,000
Created API Details /created 1777051893	2026-04-24 17:31:33 UTC
Description API Details /description GPT-5.5 is OpenAI’s frontier model designed for complex professional workloads, building on GPT-5.4 with stronger reasoning, higher reliability, and improved token efficiency on hard tasks. It features a 1M+ token...	GPT-5.5 is OpenAI’s frontier model designed for complex professional workloads, building on GPT-5.4 with stronger reasoning, higher reliability, and improved token efficiency on hard tasks. It features a 1M+ token...
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-5.5	openai/gpt-5.5
Knowledge Cutoff API Details /knowledge_cutoff 2025-12-01	2025-12-01
Links · Details API Details /links/details /api/v1/models/openai/gpt-5.5-20260423/endpoints	/api/v1/models/openai/gpt-5.5-20260423/endpoints
Name API Details /name OpenAI: GPT-5.5	OpenAI: GPT-5.5
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 0.00003	0.00003
Pricing · Input Cache Read API Details /pricing/input_cache_read 0.0000005	0.0000005
Input Price · USD/Token API Details /pricing/prompt 0.000005	0.000005
Pricing · Web Search API Details /pricing/web_search 0.01	0.01

Reasoning · 3

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

Provider Limits · 3

Top Provider · Context Length API Details /top_provider/context_length 1050000	1,050,000
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
Pricing · Overrides API Details /pricing/overrides Array · See Items	Array · See Items
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

file
image
text

API Details

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

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

21 items · source order preserved

Item	Arena	Category	Elo	Rank	Win Rate
1	agents	agenticgamedev	1179	14	52.4
2	agents	agentichtmlslides	1084	8	34.2
3	agents	agenticslides	1150	6	43.5
4	agents	agenticslides(html)	1077	8	33.2
5	agents	agenticslides(python-pptx)	1155	6	45.2
6	agents	androidnative	1178	19	50.9
7	agents	fullstack	1089	29	43
8	agents	godotgamedev	1173	18	52.3
9	agents	htmlslides	1067	22	35.6
10	agents	mobileapps	1139	30	50.4
11	agents	pptxslides	1157	6	45.3
12	agents	python-pptxslides	1152	23	43.3
13	agents	webapps	1110	33	42.6
14	models	3d	1196	49	49.5
15	models	asciiart	1258	13	58.4
16	models	codecategories	1262	35	53.1
17	models	dataviz	1266	26	55.7
18	models	gamedev	1297	20	57.3
19	models	svg	1235	16	55.2
20	models	uicomponent	1261	35	53.3
21	models	website	1258	39	52.3

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	agenticgamedev	1179	14	52.4
2	agents	agentichtmlslides	1084	8	34.2
3	agents	agenticslides	1150	6	43.5
4	agents	agenticslides(html)	1077	8	33.2
5	agents	agenticslides(python-pptx)	1155	6	45.2
6	agents	androidnative	1178	19	50.9
7	agents	fullstack	1089	29	43
8	agents	godotgamedev	1173	18	52.3
9	agents	htmlslides	1067	22	35.6
10	agents	mobileapps	1139	30	50.4
11	agents	pptxslides	1157	6	45.3
12	agents	python-pptxslides	1152	23	43.3
13	agents	webapps	1110	33	42.6
14	models	3d	1196	49	49.5
15	models	asciiart	1258	13	58.4
16	models	codecategories	1262	35	53.1
17	models	dataviz	1266	26	55.7
18	models	gamedev	1297	20	57.3
19	models	svg	1235	16	55.2
20	models	uicomponent	1261	35	53.3
21	models	website	1258	39	52.3

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

Pricing · Overrides

1 items · source order preserved

Item 1

Completion: 0.000045
Input Cache Read: 0.000001
Min Prompt Tokens: 272000
Prompt: 0.00001

API Details

Item	/pricing/overrides/*/completion	/pricing/overrides/*/input_cache_read	/pricing/overrides/*/min_prompt_tokens	/pricing/overrides/*/prompt
1	0.000045	0.000001	272000	0.00001