Intelligence
wins
54.8
GPT-5.5
46.5
Gemini 3.1 Pro Preview
GPT-5.5 vs Gemini 3.1 Pro Preview
GPT-5.5 from OpenAI and Gemini 3.1 Pro Preview from Google are shown side by side so you can compare pricing, model IDs, context and output limits, modalities, tool use, release details, and benchmark results where data is available.
GPT-5.5OpenAI
Gemini 3.1 Pro PreviewGoogle
Basic Information
Name
GPT-5.5GPT-5.5
Model id
GPT-5.5gpt-5.5
Intro
GPT-5.5GPT-5.5 is described by OpenAI as a smarter frontier model for coding, research, data analysis, and professional knowledge work. The official launch messaging emphasizes higher capability, better speed than previous difficult-work models, and strong performance on tasks involving documents and structured analysis. Its description should focus on broad professional intelligence rather than a single niche.
Author
GPT-5.5OpenAI
Released date
GPT-5.52026-04-23
Name
Gemini 3.1 Pro PreviewGemini 3.1 Pro Preview
Model id
Gemini 3.1 Pro Previewgemini-3.1-pro-preview
Intro
Gemini 3.1 Pro PreviewGemini 3.1 Pro Preview is presented as a reliability-focused refinement of Gemini 3 Pro. Google’s preview notes emphasize better thinking, token efficiency, grounding, factuality, software engineering, agentic tool use, and multi-step execution. The preview label matters: it should be described as an advanced but evolving model for teams testing the next Pro behavior.
Author
Gemini 3.1 Pro PreviewGoogle
Released date
Gemini 3.1 Pro Preview2026-02-19
Pricing
Input
GPT-5.5$5/M
Output
GPT-5.5$30/M
Cached input
GPT-5.5$0.5/M
Input
Gemini 3.1 Pro Preview$2/M
Output
Gemini 3.1 Pro Preview$12/M
Cached input
Gemini 3.1 Pro Preview$0.2/M
Context & Output
Context length
GPT-5.51.1M
Max output tokens
GPT-5.5128K
Context length
Gemini 3.1 Pro Preview1M
Max output tokens
Gemini 3.1 Pro Preview65.5K
Capabilities
Reasoning
GPT-5.5
Knowledge
GPT-5.52025-12-01
Attachment
GPT-5.5
Input modalities
GPT-5.5Image, PDF, Text
Output modalities
GPT-5.5Text
Temperature
GPT-5.5
Tool use
GPT-5.5
Reasoning
Gemini 3.1 Pro Preview
Knowledge
Gemini 3.1 Pro Preview2025-01-01
Attachment
Gemini 3.1 Pro Preview
Input modalities
Gemini 3.1 Pro PreviewAudio, Image, PDF, Text, Video
Output modalities
Gemini 3.1 Pro PreviewText
Temperature
Gemini 3.1 Pro Preview
Tool use
Gemini 3.1 Pro Preview
Benchmark
Coding
wins
59.1
GPT-5.5
55.5
Gemini 3.1 Pro Preview
GPT-5.5OpenAI
Gemini 3.1 Pro PreviewGoogle
Knowledge & Reasoning
GPQA
93.5%
HLE
44.3%
GPQA
wins94.1%
HLE
wins44.7%
Coding
SciCode
56.1%
Terminal-Bench Hard
wins60.6%
SciCode
wins58.9%
Terminal-Bench Hard
53.8%
Instruction Following & Agent Tasks
IFBench
75.9%
AA-LCR
wins74.3%
Tau2
93.9%
IFBench
wins77.1%
AA-LCR
72.7%
Tau2
wins95.6%
FAQ
Which model is better, GPT-5.5 or Gemini 3.1 Pro Preview?+
GPT-5.5 and Gemini 3.1 Pro Preview should be compared by workload. This page places price, context, output limits, capabilities, and benchmark data side by side. It is also relevant to: gemini vs chatgpt, chatgpt vs gemini.
Is Gemini 3.1 Pro Preview cheaper than GPT-5.5?+
Use the pricing rows above to compare input, output, and cached input prices for GPT-5.5 and Gemini 3.1 Pro Preview.
Which model supports a longer context length?+
GPT-5.5 lists 1.1M context length, while Gemini 3.1 Pro Preview lists 1M.
Can I access both models through TokenHub?+
If both models are available in the TokenHub catalog, you can route requests to GPT-5.5 and Gemini 3.1 Pro Preview through the TokenHub API.