GPT-5.5

Name: GPT-5.5
Author: OpenAI

GPTv5.5Current

OpenAI(ai lab)

Released April 23, 2026

API Docs Playground

OpenTools Scorenormalized /100

3.8

Valuescore / $M

OpenTools Score

Context1.1M tokens

Price (In / Out)$5.00/M / $30.00/M

Training CutoffDec 01, 2025

CategoryMultimodal LLM

Max Output128K tokens

About GPT-5.5

GPT-5.5 is OpenAI's smartest and most intuitive model, built for agentic work like coding, research, and data analysis. It matches GPT-5.4 per-token latency while delivering higher intelligence with significantly fewer tokens. Supports a 1,050,000 token context window and five reasoning effort levels (none through xhigh).

Capabilities

textvisioncodetool useextended thinkingcomputer useweb search

Input Modalities

textimage

Output Modalities

text

Technical Details

API Identifier: openai/gpt-5.5
Category: Multimodal LLM
Context Window: 1,050,000 tokens
Max Output Tokens: 128,000 tokens

Benchmarks

Performance scores for GPT-5.5 across standard benchmarks.

MMLUOpenAI · Apr 2026

92.4

GPQA DiamondOpenAI · Apr 2026

93.6

ARC-AGI-2OpenAI · Apr 2026

Terminal-Bench 2.0OpenAI · Apr 2026

82.7

SWE-bench ProOpenAI · Apr 2026

58.6

OSWorld-VerifiedOpenAI · Apr 2026

78.7

BrowseCompOpenAI · Apr 2026

84.4

MMMU-ProOpenAI · Apr 2026

81.2

FrontierMath Tier 4OpenAI · Apr 2026

35.4

HLE (with tools)OpenAI · Apr 2026

52.2

GDPvalOpenAI · Apr 2026

84.9

ToolathlonOpenAI · Apr 2026

55.6

CyberGymOpenAI · Apr 2026

81.8

MRCR v2 512K-1MOpenAI · Apr 2026

Artificial Analysis Intelligence Index v4.3Artificial Analysis

38.6 index

GPQA DiamondArtificial Analysis

93.5%

SciCodeArtificial Analysis

55.8%

Terminal-Bench 2.1Artificial Analysis

84.3%

Pricing

Token pricing for GPT-5.5 API usage.

Input Tokens

$5.00/M

per million tokens

Output Tokens

$30.00/M

per million tokens

Cached input: $0.50/M tokens. Long context (>272K tokens): 2x input, 1.5x output. Batch API: 50% discount. Priority: 2.5x standard.

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Creating safe AGI that benefits all of humanity

249 Tools58 MCP Servers14 ModelsFounded 2015San Francisco, CA

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249 Tools·14 Models·58 MCP Servers·5.0avg

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AI Models by OpenAI

AI models from the same organization.

Model	Context Window	Price (In / Out per M)	Capabilities
GPT-6.1 SolCurrent	1.1M	$2.00 / $10.00	textvisionreasoningcoding+4
GPT-6 SolCurrent	1.1M	$2.00 / $10.00	textvisionreasoningcoding+3
GPT-6 LunaCurrent	1.1M	$0.10 / $0.50	textvisionreasoningcoding+3
GPT-5.6 SolCurrent	1.1M	$4.00 / $20.00	textvisionreasoningcoding+5
GPT-5.6 LunaCurrent	1.1M	$0.20 / $1.20	textvisionreasoningcoding+5
GPT-5.6 TerraCurrent	1.1M	$2.00 / $12.00	textvisionreasoningcoding+5