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Models Model details

OpenAI

OpenAI: GPT-5.5 (batch)

openai/gpt-5.5:batch

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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 context window (922K input, 128K output) with support for text and image inputs, enabling large-scale reasoning, coding, and multimodal workflows within a single system.

Input
$2.5

/ 1M tokens

Output
$15

/ 1M tokens

Context window
1.05M

tokens

Limits

Context

1,050,000

tokens

Max output

128,000

12% of the context window

Model facts

Author

OpenAI

Tokenizer

GPT

Modality

Text + Image + File -> Text

Knowledge cutoff

2025-12-01

Created

Apr 24, 2026

Reasoning

Default MediumXhighHighMediumLowNone

Publication status

Hugging Face: unavailableLicense: not publishedParameter count: not published

Modalities

Input · FileInput · ImageInput · TextOutput · Text

Generation controls

Include reasoningMax tokensReasoningReasoning effortResponse formatSeedStructured outputsTool choiceToolsVerbosity

Capability scores

36.4
Agentic index

Better than 67% of models compared

74.9
Coding index

Better than 87% of models compared

38.4
Intelligence index

Better than 80% of models compared

Agent tasks

Category performance

Agentic games
Top 63%

1179 Elo

52.4% win

Godot games
Top 54%

1173 Elo

52.3% win

Android apps
Top 56%

1178 Elo

50.9% win

Mobile apps
Top 69%

1139 Elo

50.4% win

pptxslides
Top 62%

1157 Elo

45.3% win

agenticslides(python pptx)
Top 54%

1155 Elo

45.2% win

Agentic slides
Top 54%

1150 Elo

43.5% win

Slide decks
Top 78%

1152 Elo

43.3% win

Full-stack apps
Top 68%

1089 Elo

43.0% win

Web apps
Top 78%

1110 Elo

42.6% win

HTML slides
Top 91%

1067 Elo

35.6% win

Agentic HTML slides
Top 80%

1084 Elo

34.2% win

Additional published result

  • Agentic slides (HTML)

    1077 Elo · Rank #8 · 33.2% win · Top 80%

Creative tasks

Category performance

ASCII art
Top 25%

1258 Elo

58.5% win

Games
Top 19%

1295 Elo

57.0% win

Data visualization
Top 27%

1264 Elo

55.7% win

SVG
Top 25%

1233 Elo

55.1% win

UI components
Top 35%

1259 Elo

53.2% win

Code
Top 33%

1261 Elo

53.0% win

Websites
Top 34%

1258 Elo

52.3% win

3D
Top 46%

1199 Elo

49.4% win