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OpenAI · ProductGPT-6 Astra
Complex coding, research and multi-step agent work with a configurable model
Best for: Complex coding, research and multi-step agent work with a configurable modelFull profileOfficial sourceCompare up to three
Compare AI models and tools side by side
Check pricing, context, reasoning, modalities, tools and best use cases using one consistent comparison format.
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OpenAI · ProductGPT-5.6 Sol
Professional API workflows where token cost and reasoning controls matter
Best for: Professional API workflows where token cost and reasoning controls matterFull profileOfficial sourceT
OpenAI · ModelGPT-5.6 Terra
GPT-5.6 model designed to balance intelligence and cost.
Best for: Balanced professional, coding and agent workloadsOfficial sourceCapability
Reasoning
Varies by selected model or mode
Varies by selected model or mode
none, low, medium, high, xhigh, max
Speed
Varies by model, plan and workload
Varies by model, plan and workload
Balanced
Input
See documented product features
See documented product features
Text and image
Output
See documented product features
See documented product features
Text
Tools
1.05M-token context; up to 128K output; Text/image input and text output; Async tools and mid-turn steering; Reasoning effort from low to max
1.05M-token context; up to 128K output; Text/image input and text output; Reasoning effort includes none; gpt-5.6 alias routes to Sol
Functions, web search, file search, computer use and supported Responses API tools
Pricing · per 1M tokens where applicable
Input
Product or plan pricing
Product or plan pricing
$2 / 1M tokens
Cached input
Not directly comparable
Not directly comparable
$0.20 / 1M tokens
Output
Product or plan pricing
Product or plan pricing
$12 / 1M tokens
Context
Window
Varies by included model and plan
Varies by included model and plan
1.05M tokens
Max output tokens
Varies by included model and surface
Varies by included model and surface
128K tokens
Knowledge cutoff
Model-dependent; web access may add current information
Model-dependent; web access may add current information
February 16, 2026
Access
Endpoints / access
Product surface; see official source for API availability
Product surface; see official source for API availability
v1/responses, v1/chat/completions and v1/batch
Pricing note
API / 1M tokens: $10 input, $1 cached input, $50 output; long-context/tool charges extra
API / 1M tokens: $4 input, $0.40 cached input, $20 output; long-context/tool charges extra
$2 input, $0.20 cached input and $12 output per 1M tokens