OpenAI: GPT-5.5
Analysis Summary
GPT-5.5 is OpenAI's current flagship, topping both the intelligence index (60.2) and coding index (59.1) across the entire benchmarked field. Its agentic index of 77.2 is the highest recorded, and benchmark scores across GPQA (0.935), HLE (0.443), terminalbench (0.606), and tau2 (0.939) confirm consistent leadership across reasoning, coding, and autonomous task completion.
For businesses, GPT-5.5 is the strongest available option for autonomous coding agents, complex multi-step analysis, long-document reasoning, and high-stakes client-facing workflows. Vision, tool use, and function calling are all confirmed, and a 1M token context window supports full codebase or large document ingestion. Instruction following (ifbench 0.759) and long-context reasoning (lcr 0.743) are both class-leading.
At $5 input and $30 output, pricing is competitive for a model at this capability tier. Teams running the most demanding workloads, from software engineering to autonomous research agents, should treat GPT-5.5 as the primary benchmark against which all other models are measured.
Assessed June 6, 2026
Editorial notes
GPT-5.5 from OpenAI leads the intelligence and coding rankings globally, with a 1M token context, vision, tool use, and function calling at $5 input, making it the strongest all-round business model available.
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 378 AI models we track for overall intelligence, #2 of 315 for coding, #2 of 289 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 315 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.
