GPT-5.5 (high)
Analysis Summary
GPT-5.5 high is an OpenAI reasoning variant with an intelligence index of 54.7 and a coding index of 71.6. It records excellent results for instruction following, long-context work, terminal tasks, and tool-oriented task success. The measured profile is close to the flagship variant, although the supplied data does not list vision, tool use, or function calling for this specific entry.
It fits complex software engineering, high-stakes analysis, long-form content development, SEO planning, and supervised agentic workflows. Strong instruction following is valuable when client deliverables must obey exact formatting, tone, or compliance requirements. At the listed pricing, high-volume routine generation is a poor use of the model.
Use GPT-5.5 high when maximum text reasoning is needed and integrations are already handled elsewhere. Select the full GPT-5.5 entry when native multimodal and tool capabilities are required.
Assessed August 9, 2026
Editorial notes
GPT-5.5 high delivers near-frontier reasoning, coding, instruction following, terminal performance, and task success, making it a strong choice for complex client work at premium token pricing.
Rankings consider pricing, capabilities, benchmarks, and real-world applicability and are refreshed as new models launch. Feedback?
DFO Verdict
GPT-5.5 high delivers near-frontier reasoning, coding, instruction following, terminal performance, and task success, making it a strong choice for complex client work at premium token pricing.
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 #20 of 424 AI models we track for overall intelligence, #18 of 197 for coding, #31 of 179 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 701 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 #18 of 197 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.
