GPT-5.5 (high)
Analysis Summary
GPT-5.5 high is a reasoning-focused configuration with strong results across general intelligence, coding, instruction following, long-context reasoning, terminal tasks, and tool-use reliability. The measured profile supports complex multi-step work where careful planning matters more than raw response speed.
It is well suited to software engineering, technical research, autonomous workflows, structured content production, and document-heavy client projects. Strong terminal and tool-use results make it a credible choice for agents that must act rather than simply answer. Pricing is premium, especially for output, so teams should reserve it for high-value tasks and use a less expensive model for routine drafting or classification.
Assessed September 7, 2026
Editorial notes
GPT-5.5 high delivers advanced reasoning, strong coding, excellent instruction following, and dependable terminal and tool-use performance. Its $5 input and $30 output pricing makes it better suited to demanding client tasks than routine volume work.
Rankings consider pricing, capabilities, benchmarks, and real-world applicability and are refreshed as new models launch. Feedback?
DFO Verdict
GPT-5.5 high delivers advanced reasoning, strong coding, excellent instruction following, and dependable terminal and tool-use performance. Its $5 input and $30 output pricing makes it better suited to demanding client tasks than routine volume work.
Benchmark scores
Magenta = intelligence · Ink = technical/agentic · Cyan = content & long-context · Grey = community benchmarks. Data: Artificial Analysis, Hugging Face.
54.7 Intelligence Index·71.6 Coding Index·45.9 Agentic Index
How GPT-5.5 (high) compares
GPT-5.5 (high) ranks #7 of 438 AI models we track for overall intelligence, #24 of 210 for coding, #29 of 192 for agentic tasks. At $5.00 per million input tokens it is cheaper than 8% 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.
Strongest on business fit. The pulled-in value corner is the trade-off, and if the shape matters more than the price, this is your model.
Compare shapes side-by-side →Pricing
| Token Type | Cost per 1M tokens | Cost per 1K tokens |
|---|---|---|
| Input | $5.00 | $0.005000 |
| Output | $30.00 | $0.030000 |
What would GPT-5.5 (high) cost your business?
Pick the job that looks most like yours, then fine-tune with the sliders. Estimates update live.
A website chatbot handling around 100 customer conversations a day, a few short messages each.
Full calculator with 776 models → Price Calculator
These numbers get smaller with the right architecture.
We route routine calls to cheap models and save GPT-5.5 (high) for the hard ones. Most clients cut their estimate by 60-80%.
Talk to our teamFrequently asked questions about GPT-5.5 (high)
How much does GPT-5.5 (high) cost?
GPT-5.5 (high) costs $5.00 per million input tokens and $30.00 per million output tokens.
Is GPT-5.5 (high) good for coding?
On our coding benchmark index, GPT-5.5 (high) ranks #24 of 210 models, placing it in the top quartile of the field for code generation and debugging.
Who created GPT-5.5 (high)?
GPT-5.5 (high) is developed by OpenAI and was released on April 23, 2026.