OpenAI · Model
GPT-6.1 Sol pricing, context window and specs
GPT-6.1 Sol costs $2 per million input tokens and $10 per million output tokens, and reads up to 1,050,000 tokens per request. By blended price it is number 35 of 60 from cheapest in OpenAI's current line-up.
- Input / 1M
- $2
- Output / 1M
- $10
- Cached / 1M
- $0.10
- Context
- 1,050,000
- Max output
- 128,000
- Released
- 2026-09-29
Estimate your cost with GPT-6.1 SolCompare all OpenAI modelsCount tokens for GPT-6.1 Sol
Pricing
GPT-6.1 Sol API pricing
| Price per 1M tokens | Input | Output |
|---|---|---|
| Standard | $2 | $10 |
| Cached input (read) | $0.10 | – |
| Batch API | $1 | $5 |
| Prompts of 272,000+ tokens | $4 | $15 |
Output costs 5.0× the input price, so long replies drive the bill more than long prompts. If your requests share a long fixed prefix, such as a system prompt or tool definitions, caching cuts that part to 5% of the normal input price. Once a single prompt reaches 272,000 tokens, the whole request is billed at the higher long-context rate shown above.
Examples
What GPT-6.1 Sol costs in practice
| Workload | Tokens in / out | Requests/day | Per request | Per month |
|---|---|---|---|---|
| Support chatbot50% cached | 1,500 / 400 | 1,000 | $0.00558 | $169.57 |
| RAG app20% cached | 6,000 / 500 | 500 | $0.0147 | $223.87 |
| Coding agent80% cached | 40,000 / 2,000 | 200 | $0.0392 | $238.47 |
| Document summariserbatch | 8,000 / 600 | 300 | $0.011 | $100.38 |
Change any number in the cost calculator.
Context
Context window
GPT-6.1 Sol accepts up to 1,050,000 tokens per request, roughly 787,500 English words or 1,575 pages. That budget is shared between your prompt and the reply, and a single reply is capped at 128,000 tokens.
Filling the whole window with one prompt costs about $4.20 at list price, so for repeated long-document work, retrieval (sending only the relevant parts) or prompt caching is usually much cheaper.
Features
Capabilities
- Image input
- Yes
- Tool / function calling
- Yes
- Reasoning mode
- Yes
- Prompt caching
- Yes
- Structured output
- Yes
- Open weights
- No
- Accepts
- file, image, text
- Knowledge cutoff
- Not published
As declared by the provider’s API. It shows a feature exists, not how well it works.
OpenAI
Where GPT-6.1 Sol sits in OpenAI’s line-up
Ranked by blended price (three parts input to one part output, $4 per 1M for GPT-6.1 Sol), it is number 35 of 60 from cheapest of OpenAI’s 60 priced models. See every OpenAI model and price
| Model | Input / 1M | Output / 1M | Context | Released |
|---|---|---|---|---|
| GPT-6.1 Sol (this page) | $2 | $10 | 1,050,000 | 2026-09-29 |
| GPT-6.1 Sol Pro | $2 | $10 | 1,050,000 | 2026-09-29 |
| GPT-6 Luna | $0.10 | $0.50 | 1,050,000 | 2026-09-22 |
| GPT-6 Luna Pro | $0.10 | $0.50 | 1,050,000 | 2026-09-22 |
| GPT-6 Sol | $2 | $10 | 1,050,000 | 2026-09-22 |
| GPT-6 Sol Pro | $2 | $10 | 1,050,000 | 2026-09-22 |
| GPT-6 Astra | $10 | $50 | 1,050,000 | 2026-09-04 |
| GPT-6 Astra Pro | $10 | $50 | 1,050,000 | 2026-09-04 |
Save
Cheaper alternatives
- Qwen3.6 FlashQwen89% cheaper
- GLM 4.6VZ.ai89% cheaper
- GPT-5.6 LunaOpenAI89% cheaper
- Gemini 3.1 Flash LiteGoogle86% cheaper
- Command A+Cohere85% cheaper
Current models from major providers, one per provider, that keep image input, tool calling, a reasoning mode, a usable context window and output limit. Compared by blended price.
Compare
Similarly priced models
- Claude Sonnet 5Anthropic$2 / $10
- GLM 5.3 PrimeZ.ai$2.80 / $8.80
- Gemini 3.1 Pro PreviewGoogle$2 / $12
- Kimi K3Moonshot AI$0.53 / $12
- Nova Premier 1.0Amazon$2.50 / $12.50
Current models from other major providers, closest blended price.
FAQ
GPT-6.1 Sol questions
How much does GPT-6.1 Sol cost?
GPT-6.1 Sol costs $2 per million input tokens and $10 per million output tokens, with cached input at $0.10. A typical chatbot reply (1,500 tokens in, 400 out) costs about $0.007. Use the LLM cost calculator for your own workload.
What is GPT-6.1 Sol's context window?
1,050,000 tokens, about 787,500 English words or 1,575 printed pages, shared between your prompt and the reply. A single reply can be up to 128,000 tokens.
Does GPT-6.1 Sol support prompt caching and batch requests?
Yes, cached input is billed at $0.10 per million tokens (5% of the normal input price). A batch API is available at $1 input and $5 output per million tokens.
What are cheaper alternatives to GPT-6.1 Sol?
With the same essentials (image input and tool calling), the cheapest options are Qwen3.6 Flash (89% cheaper), GLM 4.6V (89% cheaper), GPT-5.6 Luna (89% cheaper). Cheaper doesn't mean equivalent, so test them on your own prompts.
Is GPT-6.1 Sol open source?
No, GPT-6.1 Sol is only available through OpenAI's API and partners; its weights aren't published.