OpenAI: GPT-5.5
Analysis Summary
GPT-5.5 is OpenAI's high-end general model, with an intelligence index of 56.3 and a coding index of 74.9. Its 1.05 million-token context window, image and file input, vision, tool use, and function calling give it a broad operational range. The agentic index of 47.4 also supports multi-step work where tool interaction matters.
For agency workflows, it can support software engineering, long-document analysis, visual review, and structured automation in one model. Those capabilities make it a strong choice for work where quality and breadth matter, including client-facing content and SEO tasks that require careful instruction following. Listed input pricing is $5 per million tokens and output pricing is $30, so it is better reserved for high-value tasks than routine bulk generation. Pair it with a lower-cost model for repetitive traffic.
Assessed September 23, 2026
Editorial notes
GPT-5.5 combines frontier reasoning and coding with tool use, function calling, vision, and a 1.05M-token context window, making it well suited to complex client workflows; premium output pricing favors selective use.
The DFO score ranks models on the Artificial Analysis Intelligence Index and is refreshed as new models launch. The write-up and verdict are our own. Feedback?
DFO Verdict
GPT-5.5 combines frontier reasoning and coding with tool use, function calling, vision, and a 1.05M-token context window, making it well suited to complex client workflows; premium output pricing favors selective use.
Benchmarks
Artificial Analysis data refreshed Sep 24, 2026. Arena ratings from the Sep 13, 2026 text leaderboard, with style control.
How OpenAI: GPT-5.5 compares
OpenAI: GPT-5.5 ranks #26 of 428 AI models we track for overall intelligence, #13 of 198 for coding, #31 of 181 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 5% of comparable models.
Dark bar = input · light bar = output, scaled to the priciest peer.
1M tokens ≈ 8 full-length novels or ~2,500 pages of business documents in a single request.
Pricing
| Token Type | Cost per 1M tokens | Cost per 1K tokens |
|---|---|---|
| Input | $5.00 | $0.005000 |
| Output | $30.00 | $0.030000 |
What would OpenAI: GPT-5.5 cost your business?
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A website chatbot handling around 100 customer conversations a day, a few short messages each.
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These numbers get smaller with the right architecture.
We route routine calls to cheap models and save OpenAI: GPT-5.5 for the hard ones. Most clients cut their estimate by 60-80%.
Talk to our teamAbout OpenAI: GPT-5.5
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..
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 #13 of 198 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.