Question 1

What is GPT-6.1 Sol?

Accepted Answer

GPT-6.1 Sol is a model from OpenAI, released on Sep 29, 2026. GPT-6.1 Sol is an upgrade to GPT-6 Sol from OpenAI, positioned below the flagship GPT-6 Astra in the GPT-6 series. It is suited for agentic coding, computer use, document-heavy professional...

Question 2

How much does GPT-6.1 Sol cost?

Accepted Answer

On the Respan gateway, input starts at $1.60 per 1M tokens on OpenAI, and output starts at $8.00 per 1M tokens on OpenAI, after gateway discounts. Averaged across 3 providers, it costs $1.87 per 1M input tokens and $9.33 per 1M output tokens.

Question 3

Which providers serve GPT-6.1 Sol on Respan?

Accepted Answer

3 providers serve GPT-6.1 Sol: OpenAI, OpenRouter, and Perplexity. Perplexity requires your own provider API key (BYOK).

Question 4

What is GPT-6.1 Sol's context window?

Accepted Answer

GPT-6.1 Sol accepts up to 1.1M tokens of context on its largest provider route.

Question 5

How do I use GPT-6.1 Sol with the Respan gateway?

Accepted Answer

Point any OpenAI-compatible SDK at https://api.respan.ai/api/ with your Respan API key and set the model to "openai/gpt-6.1-sol". To set it up with a coding agent, copy the agent setup prompt at the top of this page.

Question 6

How fast is GPT-6.1 Sol?

Accepted Answer

Over the last 30 days of requests through the Respan gateway, the fastest provider was OpenAI at 14 tokens per second, and the lowest response latency was 1.7 seconds on OpenAI. Speed varies with request size and provider.

Question 7

Where does GPT-6.1 Sol rank on the Respan Index?

Accepted Answer

GPT-6.1 Sol scores 69.4 out of 100 on the Respan Index v1.1, ranking #4 of 138 models. By category: Coding 61.1, Agents 72.5, Reasoning 78.6, Knowledge & language 74.5, and Human preference 59.0. The Respan Index combines independent and lab-reported benchmark results into one score, using benchmark data collected by llmmetric.com.

Question 8

How does GPT-6.1 Sol score on benchmarks?

Accepted Answer

GPT-6.1 Sol has 24 published benchmark scores, including LiveBench Coding 80.7%, APEX-Agents 60%, and GPQA Diamond 95.4%. Each score links to where it was published; the data is collected by llmmetric.com.

Provider	Context	Input	Output
OpenAISave 20%`openai/gpt-6.1-sol`	1.1M	$1.60/M	$8.00/M
OpenRouter`openrouter/openai/gpt-6.1-sol`	1.1M	$2.00/M	$10.00/M
PerplexityBYOK only`perplexity/openai/gpt-6.1-sol`	1.1M	$2.00/M	$10.00/M

GPT-6.1 Sol

Providers

Certified where it counts.

Pricing

Cost by volume

Throughput and latency

Output speed

Time to first token

Response latency

Benchmarks

Respan Indexv1.1

Coding2

Agents

Apps

GPT-6.1 Sol FAQ

Works with your entire stack

Built for AI agents.
Break less.
Ship more.

Reasoning7

Math4

Knowledge3

Multimodal1

Arena4

Other1