GPT-5.5 (high)
Analysis Summary
GPT-5.5 (high) sits near the top of OpenAI's current lineup, combining strong general reasoning with excellent coding and agentic benchmarks. Its instruction-following and long-context reasoning scores make it well suited to complex, multi-step tasks that require precision.
For businesses, this model is a strong fit for software engineering, autonomous agent workflows, and high-stakes client-facing content where accuracy matters. The main trade-off is cost: at $5 input and $30 output per million tokens, it is priced for high-value work rather than bulk automation.
Teams building coding agents or handling complex analytical workloads should consider this a primary model, pairing it with cheaper alternatives for routine, high-volume tasks.
Assessed July 29, 2026
Editorial notes
GPT-5.5 (high) from OpenAI delivers frontier reasoning, top-tier coding and agentic reliability, plus strong instruction following for demanding client work.
Rankings consider pricing, capabilities, benchmarks, and real-world applicability and are refreshed as new models launch. Feedback?
DFO Verdict
GPT-5.5 (high) from OpenAI delivers frontier reasoning, top-tier coding and agentic reliability, plus strong instruction following for demanding client work.
Benchmark scores
Magenta = intelligence · Ink = technical/agentic · Cyan = content & long-context · Grey = community benchmarks. Data: Artificial Analysis, Hugging Face.
53.1 Intelligence Index·71.6 Coding Index·43.5 Agentic Index
How GPT-5.5 (high) compares
GPT-5.5 (high) ranks #10 of 401 AI models we track for overall intelligence, #10 of 176 for coding, #20 of 157 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 content. 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 688 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 teamEmbed this ranking
Frequently 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 #10 of 176 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.
