OpenAIText Generation/v1/ai/chatReasoning

GPT-6.1 Sol Pro API

Access GPT-6.1 Sol Pro through one API key. OpenAI GPT-6.1 Sol High-Effort Reasoning.

GPT-6.1 Sol Pro is the same model as GPT-6.1 Sol, served in pro reasoning mode for higher-quality answers on complex tasks. Use it for the hard steps: difficult debugging, multi-constraint planning and analysis where a better answer is worth more reasoning tokens.

Full Docs Get API Key — Free $5 Credit

No credit card required. Takes 30 seconds.

GPT-6.1 Sol Pro API pricing

Pay per request from your YepAPI balance — no subscription, no monthly minimum. Prices updated October 23, 2026.

Token type	Price
Input	$2.95 / 1M tokens
Output (incl. reasoning)	$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

2,400+

Developers

1.2M+

API calls served

100+

Endpoints

$0.01

Per call

Yep, that's it.

Try it live

Send a message and see GPT-6.1 Sol Pro respond in real time.

POST/v1/ai/chatopenai/gpt-6.1-sol-pro

Message *

Max Tokens

Maximum tokens in the response.

Stream

Real-time tokens

Hit "Send Request" to see the response

GPT-6.1 Sol Pro specs

Provider	OpenAI
Model ID	openai/gpt-6.1-sol-pro
Endpoint	/v1/ai/chat
Type	Text Generation
Context window	1.05M tokens
Max output	128K tokens
Reasoning	Yes
OpenAI-compatible	Yes — /v1/ai/chat/completions

How to get a GPT-6.1 Sol Pro API key

1
Create a free account
Sign up at yepapi.com with Google or email. It takes about 30 seconds and needs no card.
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-6.1 Sol Pro
Send a request to /v1/ai/chat with the x-api-key header and model "openai/gpt-6.1-sol-pro".
4
Pay as you go
Usage is billed per request from your balance. Top up any amount; there is no subscription.

Strengths

✓

Pro reasoning mode

Runs GPT-6.1 Sol with a higher reasoning effort for more careful answers on complex problems.

✓

Same per-token price as Sol

$2.95 / $14.77 per 1M tokens; the difference is how many reasoning tokens a request uses.

✓

1M token context

Up to 1,050,000 input tokens and 128,000 output tokens per call.

✓

For the hard steps

Pair it with GPT-6.1 Sol: route routine calls to Sol and only the difficult ones to Pro.

Quick start

Copy this snippet and start making calls with GPT-6.1 Sol Pro.

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-6.1-sol-pro",
    "messages": [
      {
        "role": "user",
        "content": "Explain API gateways in 2 sentences."
      }
    ],
    "maxTokens": 256
  }),
});
const { data } = await res.json();
console.log(data.message.content);

GPT-6.1 Sol Pro vs similar models

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

Model	Provider	Price	Context
GPT-6.1 Sol Pro	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-6.1 Sol Pro 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-6.1 Sol Pro API — pricing, context window & access

GPT-6.1 Sol Pro is the same model as GPT-6.1 Sol, served in pro reasoning mode for higher-quality answers on complex tasks. 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-6.1 Sol Pro 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-6.1 Sol Pro?

GPT-6.1 Sol Pro is the same model as GPT-6.1 Sol, served in pro reasoning mode for higher-quality answers on complex tasks. Pro mode spends far more reasoning tokens per request than standard Sol, so the per-token price is the same but a typical call costs more; reserve it for problems that need it. 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-6.1 Sol Pro via YepAPI

YepAPI serves GPT-6.1 Sol Pro on the OpenAI-compatible /v1/ai/chat endpoint. Point your base URL at YepAPI, add your key, and set the model string to gpt-6.1-sol-pro (or the full openai/gpt-6.1-sol-pro). 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-6.1 Sol Pro API pricing — $2.95 / 1M input, $14.77 / 1M output

GPT-6.1 Sol Pro 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.

GPT-6.1 Sol Pro use cases

Use it for the hard steps: difficult debugging, multi-constraint planning and analysis where a better answer is worth more reasoning tokens.

Try GPT-6.1 Sol Pro free

Every new YepAPI account includes $5 in free credit with no card required — enough to test GPT-6.1 Sol Pro on your own prompts before committing to paid usage. Create an account, copy your key, and call gpt-6.1-sol-pro right away.

Start generating in 30 seconds

$5 free credit on signup. No credit card required. Pay per call.

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-6.1 Sol Pro 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-6.1 Sol Pro and every other model — no separate OpenAI account or waitlist.

New YepAPI accounts in most countries get free signup credit, enough to test GPT-6.1 Sol Pro without a card. After that you pay per request at the rates above — there is no subscription.

Use "openai/gpt-6.1-sol-pro" as the model on /v1/ai/chat. The short alias "gpt-6.1-sol-pro" also works.

Yes. Point the OpenAI SDK at https://api.yepapi.com/v1/ai with your YepAPI key and set model to "openai/gpt-6.1-sol-pro". Streaming works the same way, so existing OpenAI code only needs the base URL and key changed.

GPT-6.1 Sol Pro supports a 1.1M token context window with up to 128K output tokens per request.