Best overall
Strong reasoning, tooling and production reliability.
Model · OpenAI
GPT-6.1 Sol
GPT-6.1 Sol is served by OpenAI through OpenRouter. It provides 1.05M tokens of context and supports text, vision, files inputs.
Context window
1.05M tokens
Input / 1M tokens
$2.00
Output / 1M tokens
$10.00
Key facts
| Provider | OpenAI |
| OpenRouter ID | openai/gpt-6.1-sol |
| Modalities | Text, Vision, Files |
| Best for | Overall, Coding, Agents |
Source
openrouter.ai/api/v1/models Verified 2026-10-10 Drift-checked daily 06:00 CST Best-fit workloads
Best for coding
Good code quality, debugging and technical explanation.
Best for agents
Tool use, structured output and multi-step reasoning.
Cost estimates
These examples use the 2026-10-10 input and output prices. Cache discounts, provider surcharges and tool fees are excluded.
| Workload | Input | Output | Estimated cost |
|---|---|---|---|
| Quick test | 20,000 | 5,000 | $0.090 |
| Product chat month | 500,000 | 125,000 | $2.25 |
| Document batch | 5,000,000 | 1,000,000 | $20.00 |
Strengths
- ✓ $2 / $10 per million — the same price as the GPT-6 Sol it replaces, with a 6.1 revision
- ✓ 1.05M-token context and a 128K output ceiling
- ✓ Takes text, image and file input, so document-heavy work does not need a second model
Limitations
- ! Text output only
- ! GPT-6 Astra sits above it at $10 / $50, which makes Sol the mid-tier rather than the ceiling
- ! Three GPT-6 names are live at once (luna, sol, astra) plus a 6.1 revision: version-picking is part of the cost
OpenRouter API quickstart
Run these examples from your server or edge function. Keep the OpenRouter API key private and do not expose it in browser code.
cURL
curl https://openrouter.ai/api/v1/chat/completions \
-H "Authorization: Bearer $OPENROUTER_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "openai/gpt-6.1-sol",
"messages": [{ "role": "user", "content": "Summarize this document in five bullet points." }],
"max_tokens": 500
}'JavaScript / TypeScript
const response = await fetch("https://openrouter.ai/api/v1/chat/completions", {
method: "POST",
headers: {
Authorization: `Bearer ${process.env.OPENROUTER_API_KEY}`,
"Content-Type": "application/json",
},
body: JSON.stringify({
model: "openai/gpt-6.1-sol",
messages: [{ role: "user", content: "Summarize this document in five bullet points." }],
max_tokens: 500,
}),
});
const data = await response.json();
console.log(data.choices[0].message.content);How to evaluate GPT-6.1 Sol
- Run five real tasks from your product, not generic demo prompts.
- Record token usage, latency and output quality.
- Estimate cost using your real input/output mix.
- Compare it against one model with a similar price and one stronger model.
Compare models View on OpenRouter ↗
GPT-6.1 Sol FAQ
What is GPT-6.1 Sol?
GPT-6.1 Sol is a OpenAI model available through OpenRouter. It supports text, vision, files inputs and is suited for overall, coding, agents workloads.
How much does GPT-6.1 Sol cost on OpenRouter?
The 2026-10-10 snapshot lists $2.00 per 1M input tokens and $10.00 per 1M output tokens. Verify current pricing on OpenRouter before production.
How large is GPT-6.1 Sol's context window?
GPT-6.1 Sol offers 1.05M tokens of context in the current snapshot. Provider-specific limits and surcharges may apply.
Head-to-head comparisons
Claude Sonnet 5.5 vs GPT-6.1 Sol
There is no price argument here, which makes it a rare clean A/B: run your own prompts through both and pick on output. The catalogue's own positioning says Sonnet 5.5 is for well-scoped everyday work and GPT-6.1 Sol for agentic coding and document-heavy professional work — that is a hint about the intended shape of the workload, not a benchmark.
Pricing and context data are based on a 2026-10-10 snapshot. Provider limits can change; always verify on OpenRouter before production.