GPT-6.1 Sol API

GPT-6.1 model from OpenAI with near-Astra performance at a lower cost for complex coding, computer use and professional work: text and image input over a 1.05M-token context, with reasoning, and tool calling and server tools via the Responses API.

Modalities
Image, TextText
In / Out price
$2/$10per 1M
Context window
1.05M tokens
Released
Sep 29, 2026

GPT-6.1 Sol overview

The pelican test: one prompt, every text model, unedited SVG output from Nov 3, 2026.

SVG of a pelican riding a bicycle, written by GPT-6.1 Sol through AI/ML API

GPT-6.1 Sol specs

Model ID
openai/gpt-6.1-sol
Developer
OpenAI
Context window
1,050,000 tokens
Max output
128,000 tokens
Input
Image, Text
Output
Text
API
OpenAI-compatible, base URL https://api.aimlapi.com/v1

Capabilities

  • File input
  • Reasoning
  • Streaming
  • Structured outputs
  • Function calling
  • Vision

GPT-6.1 Sol benchmarks by Artificial Analysis

See how GPT-6.1 Sol compares in intelligence, generation speed and cost per task. Data retrieved Nov 3, 2026.

Intelligence

Index v5.0

Speed

Output tokens / second

Cost per task

USD / benchmark task

Benchmark results

Compare 5 models available on AI/ML API across 4 independent benchmarks.

Humanity's Last Exam

Expert-written questions across academic subjects.

GPT-6.1 Sol API pricing

GPT-6.1 Sol pricing in US dollars
UsagePriceUnit
Input$21M tokens
Output$101M tokens
Cached input$0.11M tokens

Prices from the AI/ML API price list, checked on Nov 4, 2026.

GPT-6.1 Sol vs other models: token prices

AI/ML API input and output rates for 5 models, per million tokens.

AI/ML API model prices in USD per million tokens
ModelInputOutput
GPT-6.1 Sol$2$10
GPT-6 Luna$0.1$0.5
GPT-6.1 Terra$1$5
GPT-6 Sol$2$10
GPT-6.1 Terra Pro$2.12$10.58

How to use the GPT-6.1 Sol API

View docs

Build with your agent

Give your agent the model details, code and documentation.

1Get your API key

Create API key
export AIMLAPI_KEY="8f2b4c7d9a1e6b3f…"

2Make your first request

curl 'https://api.aimlapi.com/v1/chat/completions' \
  -H "Authorization: Bearer $AIMLAPI_KEY" \
  -H 'Content-Type: application/json' \
  -d '{
  "model": "openai/gpt-6.1-sol",
  "messages": [
    {
      "role": "user",
      "content": "Write a haiku about the ocean."
    }
  ]
}'

GPT-6.1 Sol FAQ

Is GPT-6.1 Sol available on AI/ML API?

Yes. OpenAI announced the model on 29 September 2026 and it went live on AI/ML API the same day. Call it as openai/gpt-6.1-sol on the standard chat completions endpoint.

What does GPT-6.1 Sol cost?

GPT-6.1 Sol costs $2 input and $10 output per 1M tokens on AI/ML API, billed as you go with no subscription.

How large is the context window?

1,050,000 tokens, with up to 128,000 tokens of output. OpenAI gives the knowledge cutoff as 30 April 2026.

What can GPT-6.1 Sol do?

It takes text and image input and returns text. OpenAI lists streaming, structured outputs, function calling, file search, web search and prompt caching, plus reasoning with effort levels from low through max.

What is the GPT-6.1 Sol model ID?

Use openai/gpt-6.1-sol as the model parameter. Requests go to the OpenAI-compatible endpoint with your AI/ML API key.

Start building with GPT-6.1 Sol

GPT-6.1 Sol API

openai/gpt-6.1-sol

Build with your agent

Give your agent the model details, code and documentation.

1Get your API key

Create API key
export AIMLAPI_KEY="8f2b4c7d9a1e6b3f…"

2Make your first request

curl 'https://api.aimlapi.com/v1/chat/completions' \
  -H "Authorization: Bearer $AIMLAPI_KEY" \
  -H 'Content-Type: application/json' \
  -d '{
  "model": "openai/gpt-6.1-sol",
  "messages": [
    {
      "role": "user",
      "content": "Write a haiku about the ocean."
    }
  ]
}'