OpenAI: GPT-5.5
Analysis Summary
OpenAI GPT-5.5 is the flagship model from OpenAI, sitting at the frontier of measured performance with an intelligence index of 54.8, coding index of 74.9, and agentic index of 77.2. Its GPQA of 0.935, HLE of 0.443, and terminal benchmark of 0.606 are among the highest in the field, and its instruction-following score of 0.759 and long-context retrieval of 0.743 confirm reliability across demanding business workloads. Vision, tool use, function calling, and a 1.05M token context window complete a comprehensive capability profile.
For businesses, GPT-5.5 is the strongest available option for autonomous coding agents, complex multi-step reasoning, long-document analysis, and client-facing content where accuracy is non-negotiable. The 1M context window allows entire codebases or large document sets to be processed in a single call.
At $5 input and $30 output per million tokens, it is priced competitively for a frontier model. Teams with demanding workloads across coding, agents, and content should treat it as the primary benchmark against which other models are evaluated.
Assessed June 30, 2026
Editorial notes
OpenAI GPT-5.5 leads the field with a 54.8 intelligence index, 74.9 coding index, and 77.2 agentic index, paired with vision, tool use, a 1M token context, and best-in-class scores across reasoning, instruction following, and long-context retrieval.
Rankings consider pricing, capabilities, benchmarks, and real-world applicability and are refreshed as new models launch. Feedback?
Performance Profile
How OpenAI: GPT-5.5 compares
OpenAI: GPT-5.5 ranks #3 of 385 AI models we track for overall intelligence, #2 of 139 for coding, #3 of 293 for agentic tasks. Its 1.1M-token context window is larger than 98% of the models we list. At $5.00 per million input tokens it is cheaper than 7% of comparable models.
About OpenAI: GPT-5.5
GPT-5.5 is OpenAIās 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..
Capabilities
Performance Indices
Source: Artificial Analysis
Benchmark Scores
Intelligence
Technical
Content
Benchmark data from Artificial Analysis and Hugging Face
How does OpenAI: GPT-5.5 stack up?
Compare side-by-side with other frontier models.
Model Information
| OpenRouter ID |
openai/gpt-5.5
|
| Provider | openai |
| Release Date | April 24, 2026 |
| Context Length | 1,050,000 tokens |
| Max Completion | 128,000 tokens |
| Status | Active |
Pricing
| Token Type | Cost per 1M tokens | Cost per 1K tokens |
|---|---|---|
| Input | $5.00 | $0.005000 |
| Output | $30.00 | $0.030000 |
Live Performance
Live endpoint metrics, refreshed every 30 minutes.
Leaderboard Categories
External Resources
Frequently asked questions about OpenAI: GPT-5.5
How much does OpenAI: GPT-5.5 cost?
OpenAI: GPT-5.5 costs $5.00 per million input tokens and $30.00 per million output tokens.
What is the context window of OpenAI: GPT-5.5?
OpenAI: GPT-5.5 has a context window of 1,050,000 tokens (1.1M).
Is OpenAI: GPT-5.5 good for coding?
On our coding benchmark index, OpenAI: GPT-5.5 ranks #2 of 139 models, placing it in the top quartile of the field for code generation and debugging.
What can OpenAI: GPT-5.5 do?
OpenAI: GPT-5.5 supports image/vision input, tool use, and function calling.
Who created OpenAI: GPT-5.5?
OpenAI: GPT-5.5 is developed by OpenAI and was released on April 24, 2026.
