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 Nov 7, 2026. Arena ratings from the Oct 28, 2026 text leaderboard, with style control.
Artificial Analysis no longer lists this model, so its indexes are converted from their older scale to stay comparable.
How OpenAI: GPT-5.5 compares
OpenAI: GPT-5.5 ranks #45 of 447 AI models we track for overall intelligence, #22 of 199 for coding, #38 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 #22 of 199 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.