OpenAIText Generation/v1/ai/chat

GPT-6 Sol API

Access GPT-6 Sol through one API key. OpenAI GPT-6 Cost-Efficient High-End.

GPT-6 Sol is the cost-efficient high-end model in OpenAI's GPT-6 series, positioned below the flagship GPT-6 Astra and above the fast GPT-6 Luna tier. Sol is the right pick for production agents, coding assistants and analysis pipelines that need GPT-6 quality at volume: multi-step tool use, long document work, and code changes that must be correct, with the flagship reserved for the hardest steps.

Full Docs Get API Key

Takes 30 seconds.

GPT-6 Sol API pricing

Pay per request from your YepAPI balance — no subscription, no monthly minimum. Prices updated September 27, 2026.

Token type	Price
Input	$2.95 / 1M tokens
Output	$14.77 / 1M tokens
Context window	1.1M tokens

What it costs	Per job	Per 1,000
Chat reply1K input + 500 output tokens	$0.01	$10.33
RAG answer8K input + 800 output tokens	$0.035	$35.42
Agent step with tools30K input + 2K output tokens	$0.118	$118.04
Long document summary100K input + 2K output tokens	$0.325	$324.54

4,900+

Developers

2.3M+

API calls served

184

Endpoints

$0.01

Per call

Yep, that's it.

Try it live

Send a message and see GPT-6 Sol respond in real time.

POST/v1/ai/chatopenai/gpt-6-sol

Message *

Max Tokens

Maximum tokens in the response.

Stream

Real-time tokens

Hit "Send Request" to see the response

GPT-6 Sol specs

Provider	OpenAI
Model ID	openai/gpt-6-sol
Endpoint	/v1/ai/chat
Type	Text Generation
Context window	1.05M tokens
Max output	128K tokens
Reasoning	No
OpenAI-compatible	Yes — /v1/ai/chat/completions

How to get a GPT-6 Sol API key

1
Create an account
Sign up at yepapi.com with Google or email. It takes about 30 seconds.
2
Create an API key
Open the dashboard, go to API Keys and create a key. Copy it — it starts with yep_sk_.
3
Call GPT-6 Sol
Send a request to /v1/ai/chat with the x-api-key header and model "openai/gpt-6-sol".
4
Pay as you go
Usage is billed per request from your balance. Top up any amount; there is no subscription.

Strengths

✓

GPT-6 at a fifth of Astra's price

The same generation as GPT-6 Astra — reasoning, tool use, coding — served at $2.95 / $14.77 per 1M tokens instead of $14.77 / $73.85.

✓

1M token context, 128K output

Handles up to 1,050,000 input tokens and returns up to 128,000 output tokens, so whole repositories and long agent histories fit in one request.

✓

Agentic tool use

Built for multi-step agent loops with reliable function calling, JSON schema structured outputs and a tunable reasoning effort.

✓

Multimodal input

Accepts text, images and files, so screenshots, PDFs and diagrams can go straight into the prompt.

Quick start

Copy this snippet and start making calls with GPT-6 Sol.

const res = await fetch('https://api.yepapi.com/v1/ai/chat', {
  method: 'POST',
  headers: {
    'x-api-key': 'YOUR_API_KEY',
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({
    "model": "openai/gpt-6-sol",
    "messages": [
      {
        "role": "user",
        "content": "Explain API gateways in 2 sentences."
      }
    ],
    "maxTokens": 256
  }),
});
const { data } = await res.json();
console.log(data.message.content);

GPT-6 Sol vs similar models

Every model below runs on the same API key — switch by changing the model ID.

Model	Provider	Price	Context
GPT-6 Sol	OpenAI	$2.95 in / $14.77 out per 1M	1.1M
GPT-6 Luna	OpenAI	$0.15 in / $0.74 out per 1M	1.1M
GPT-6 Luna Pro	OpenAI	$0.15 in / $0.74 out per 1M	1.1M
GPT-4o Mini	OpenAI	$0.22 in / $0.89 out per 1M	128K
GPT-OSS 120B	OpenAI	$0.22 in / $0.89 out per 1M	131K
GPT-5.6 Luna	OpenAI	$0.30 in / $1.77 out per 1M	1.1M
Nemotron 3 Super	NVIDIA	$0 in / $0 out per 1M	262K
Qwen3.7 Flash	Qwen	$0.04 in / $0.19 out per 1M	1M

Why use GPT-6 Sol through YepAPI?

✓One API key for all models — no separate accounts

✓OpenAI SDK compatible — just change the base URL

✓No monthly minimums — pay per token

✓Switch models with one line of code

✓Full provider passthrough — citations, search results, and all extras included

✓Streaming and non-streaming support on every model

✓Works with Cursor, Claude, LangChain, and any LLM tool

✓Unified billing across all providers

GPT-6 Sol API — pricing, context window & access

GPT-6 Sol is the cost-efficient high-end model in OpenAI's GPT-6 series, positioned below the flagship GPT-6 Astra and above the fast GPT-6 Luna tier. It pairs a 1,050,000-token context window with up to 128,000 output tokens per response, at $2.95 per 1M input and $14.77 per 1M output tokens through YepAPI.

Through YepAPI you call GPT-6 Sol on an OpenAI-compatible endpoint with a single key — the same key that reaches GPT-6, Claude, Gemini, Grok and the SEO, SERP and scraping APIs. Input: text, images, files.

What is GPT-6 Sol?

GPT-6 Sol is the cost-efficient high-end model in OpenAI's GPT-6 series, positioned below the flagship GPT-6 Astra and above the fast GPT-6 Luna tier. It carries the GPT-6 generation's reasoning, tool use and coding into a price band a fifth of Astra's, which makes it the default GPT-6 model for demanding professional work that does not need the flagship on every call. A GPT-6 Sol Pro variant runs the same model in a higher-effort reasoning mode. It accepts text, images, files as input, handles up to 1,050,000 tokens of context and returns up to 128,000 output tokens per call.

Build with GPT-6 Sol via YepAPI

YepAPI serves GPT-6 Sol on the OpenAI-compatible /v1/ai/chat endpoint. Point your base URL at YepAPI, add your key, and set the model string to gpt-6-sol (or the full openai/gpt-6-sol). Function calling, structured outputs and reasoning settings pass straight through, and switching to any other model on the platform is a one-string change per request.

GPT-6 Sol API pricing — $2.95 / 1M input, $14.77 / 1M output

GPT-6 Sol costs $2.95 per 1M input tokens and $14.77 per 1M output tokens through YepAPI, pay per token with no minimums. Failed calls are never charged, and every request is itemised in your dashboard API Logs so you can see exactly what a 128,000-token response cost.

GPT-6 Sol use cases

Sol is the right pick for production agents, coding assistants and analysis pipelines that need GPT-6 quality at volume: multi-step tool use, long document work, and code changes that must be correct, with the flagship reserved for the hardest steps.

Start generating in 30 seconds

Pay per call, no subscriptions.

Get API Key

What developers say

“Switched from SerpAPI and cut our SERP costs by 80%. Same data quality, way simpler billing.”
Marcus T.
SEO Platform Founder

“One API key for AI models, SERP data, and web scraping. Saved us from managing 4 separate providers.”
Priya S.
Full-Stack Developer

“The $5 free credit let us prototype our entire rank tracking feature before committing. No other API does that.”
Jake R.
Indie Hacker

Frequently asked questions

GPT-6 Sol costs $2.95 per 1M input tokens and $14.77 per 1M output tokens through YepAPI, billed per request with no monthly fee. For example, a chat reply (1K input + 500 output tokens) costs about $0.01.

Sign up at yepapi.com (Google or email, about 30 seconds), open the dashboard and create an API key. The same key works for GPT-6 Sol and every other model — no separate OpenAI account or waitlist.

Use "openai/gpt-6-sol" as the model on /v1/ai/chat. The short alias "gpt-6-sol" also works.

Yes. Point the OpenAI SDK at https://api.yepapi.com/v1/ai with your YepAPI key and set model to "openai/gpt-6-sol". Streaming works the same way, so existing OpenAI code only needs the base URL and key changed.

GPT-6 Sol supports a 1.1M token context window with up to 128K output tokens per request.

Ready to use GPT-6 Sol?

Pay per call, no subscriptions.

Get API Key Read Docs

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