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Text & reasoningLive
OpenAIGPT-5.6 Sol
OpenAI's flagship general model for difficult coding, analysis, and professional work, with a very large context window and a broad native tool set.
Plain-English overview
What GPT-5.6 Sol actually is
GPT-5.6 Sol is the capability-first member of OpenAI's 5.6 family. It accepts text and images, produces text, and can work through the Responses API with functions, search, code execution, computer use, MCP, and other hosted tools.
The large context and 128K output ceiling suit repository-scale work and document-heavy agents, but they do not make every request cheap. Long prompts cross a higher-price threshold, and reasoning effort changes latency and token use.
Good fit for
- Complex coding and repository work
- Long-document analysis with tools
- General agents that need OpenAI's hosted tool ecosystem
Category comparison
The facts that matter for text models
These are provider-published specifications, not Cody benchmark scores. Follow the linked sources for current limits and endpoint-specific exceptions.
- Context window
- 1.05M tokensMaximum combined prompt and working context documented by the provider.
- Maximum output
- 128K tokensProvider-published response limit, where available.
- Knowledge cutoff
- February 16, 2026Latest reliable knowledge date explicitly published by the model provider. Search and connected tools can retrieve newer information but do not change the model's built-in cutoff.
- Input price
- $4 / 1MCurrent standard list price per million input tokens unless noted.
- Output price
- $20 / 1MCurrent standard list price per million output tokens unless noted.
- Inputs
- Text, imageMedia types accepted by the listed model endpoint.
- Tools & agents
- Functions, web/file search, code, computer, MCPSelected native tools and agent-building capabilities, not an exhaustive list.
Pricing & comparisons
Estimate your cost
Set your usage. Your estimate updates as you type.
Example: 6,000 input tokens for 10 pages, plus a 500-token summary. Page lengths vary; adjust the numbers below.
One run sends your input to the model once and receives an answer. Tokens are pieces of text: input is what you send, output is the answer you receive.
Advanced options
GPT-5.6 Sol
OpenAI
Estimated total (USD)
For the usage above · USD · API pricing, not a subscription
- Input tokens
- $4.00 per 1M tokens
- Output tokens
- $20.00 per 1M tokens
How this estimate works
Estimates exclude taxes, tools, cache storage/writes, free allowances and custom discounts. Image estimates cover output only, not prompt or reference-image charges. Quality modes differ by model. Unlisted settings are not treated as free.
API and provider access
Where to get GPT-5.6 Sol
Availability
Regions and access stage
Direct OpenAI API in supported countries and territories; third-party routing is also available.
Check OpenAI's live supported-country list before deployment.
Check live availabilityData and training
The route matters.
OpenAI says API inputs and outputs are not used for model training by default. Default abuse-monitoring logs may be retained for up to 30 days; qualifying organizations can request other controls.
This is a concise reading of the cited provider material, not legal advice. A third-party gateway can have different storage, routing, training, and residency terms from the model maker's direct API.
Read the provider policyFrequently asked questions
GPT-5.6 Sol FAQ
What is GPT-5.6 Sol?
OpenAI's flagship general model for difficult coding, analysis, and professional work, with a very large context window and a broad native tool set. GPT-5.6 Sol is the capability-first member of OpenAI's 5.6 family. It accepts text and images, produces text, and can work through the Responses API with functions, search, code execution, computer use, MCP, and other hosted tools.
When was GPT-5.6 Sol released?
GPT-5.6 Sol was released on July 9, 2026 according to the cited provider materials.
Where can I access GPT-5.6 Sol?
Direct OpenAI API in supported countries and territories; third-party routing is also available. The access routes listed in this guide are OpenAI and OpenRouter.
How much does GPT-5.6 Sol cost?
$4 input · $20 output / 1M tokens. OpenAI list price. Prompts above 272K input tokens use higher rates; promotional pricing is stated to last at least through November 21, 2026.
Where is GPT-5.6 Sol available?
Direct OpenAI API in supported countries and territories; third-party routing is also available. Check OpenAI's live supported-country list before deployment.
Is my GPT-5.6 Sol API data used for training?
OpenAI says API inputs and outputs are not used for model training by default. Default abuse-monitoring logs may be retained for up to 30 days; qualifying organizations can request other controls. The policy belongs to the provider route and account terms, so verify it again before production use.
Price comparison
One price per model, using the same input/output mix. We weight each API rate by its share of one million total tokens and use the lowest matching reviewed route. This is a comparison rate, not a cost per task or a quality score. Tokenizers, caching, reasoning and long context can change your actual bill.
75% input + 25% output · no cache discounts
- GPT-6 Luna$0.20
OpenAI
- Mistral Small 4$0.2625
Mistral AI
- GPT-5.6 Luna$0.45
OpenAI
- Gemini 3.8 Flash$1.50
Google
- Claude Haiku 4.5$2.00
Anthropic
- GPT-6 Sol$4.00
OpenAI
- Claude Sonnet 5$4.00
Anthropic
- GPT-5.6 Terra$4.50
OpenAI
- Daybreak Blue$8.00
OpenAI
- Claude Opus 5.5$8.00
Anthropic
- GPT-5.6 Sol$8.00
OpenAI
This model
- Claude Opus 5$10.00
Anthropic
- Claude Fable 5$20.00
Anthropic
- GPT-6 Astra$20.00
OpenAI
- Claude Fable 5.1$20.00
Anthropic
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