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Text & reasoningLive
OpenAIGPT-6.1 Sol
An OpenAI reasoning model for complex coding, research and tool-assisted work at a lower token price than Astra.
Plain-English overview
What GPT-6.1 Sol actually is
GPT-6.1 Sol accepts text and images and produces text. It gives teams a new option for working across code, reference documents and connected tools without choosing Astra's higher standard token rates.
Reasoning runs from low to max, with medium as the default. The Responses API supports tool calling and a multi-agent beta; Chat Completions supports requests without tools. Test completed-task quality and cost on your own workloads.
Good fit for
- Codebase changes
- Multi-step workflows
- Long-document analysis with tools
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
- April 30, 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
- $2 / 1MCurrent standard list price per million input tokens unless noted.
- Output price
- $10 / 1MCurrent standard list price per million output tokens unless noted.
- Inputs
- Text, imageMedia types accepted by the listed model endpoint.
- Tools & agents
- Functions, search, code, computer, image, 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-6.1 Sol
OpenAI
Estimated total (USD)
For the usage above · USD · API pricing, not a subscription
- Input tokens
- $2.00 per 1M tokens
- Output tokens
- $10.00 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-6.1 Sol
Availability
Regions and access stage
Direct API access in supported countries; account and regional restrictions apply.
US and EU data residency are supported. EU supports Standard, Flex and Batch, but not Fast mode; account eligibility and feature restrictions apply.
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-6.1 Sol FAQ
What is GPT-6.1 Sol?
An OpenAI reasoning model for complex coding, research and tool-assisted work at a lower token price than Astra. GPT-6.1 Sol accepts text and images and produces text. It gives teams a new option for working across code, reference documents and connected tools without choosing Astra's higher standard token rates.
When was GPT-6.1 Sol released?
GPT-6.1 Sol was released on September 29, 2026 according to the cited provider materials.
Where can I access GPT-6.1 Sol?
Direct API access in supported countries; account and regional restrictions apply. The access routes listed in this guide are OpenAI.
How much does GPT-6.1 Sol cost?
$2 input · $10 output / 1M tokens. Standard rates up to 272K input tokens. Cache reads cost $0.10 and writes $2.50 per 1M tokens. Longer prompts use 2× input/cache and 1.5× output rates for the full request. Batch/Flex cost 50% of Standard; Fast costs 2×. Regional processing adds 10%; tools cost extra.
Where is GPT-6.1 Sol available?
Direct API access in supported countries; account and regional restrictions apply. US and EU data residency are supported. EU supports Standard, Flex and Batch, but not Fast mode; account eligibility and feature restrictions apply.
Is my GPT-6.1 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
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- Claude Haiku 4.5$2.00
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- GPT-6.1 Sol$4.00
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Related comparisons
Head-to-head comparisons
GPT-6.1 Sol vs Claude Sonnet 5.5
A Claude model for everyday coding, writing and visual analysis, with room for large reference documents.
Open full comparisonGPT-6.1 Sol vs GPT-6 Sol
An OpenAI model for coding projects and assistants that carry out several steps with tools.
Open full comparisonGPT-6.1 Sol vs GPT-6 Astra
OpenAI's most capable model for difficult end-to-end work, combining frontier reasoning with a million-token context window and a broad set of agent tools.
Open full comparison