GPT-6.1 Sol pricing
GPT-6.1 Sol API cost from OpenAI — $2.00 per 1M input tokens and $10.00 per 1M output tokens. Sol 6.1 · $0.10 cache reads · >272K input uses long-context rates. Estimate your real monthly bill below, then compare it against every other model.
Flagship 1.05M context · all prices USD per 1M tokens, this price verified 2026-10-01.
Cache writes: $2.50 / 1M tokens. Batch and Flex: 50% of Standard. Fast mode: 2× the applicable rate.
GPT-6.1 Sol capabilities & limits
Representative specs for this tier — confirm exact limits in the OpenAI docs.
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Call GPT-6.1 Sol from your code
The exact model string and endpoint to use. Works with the OpenAI SDK — just point base_url at the URL below.
gpt-6.1-solhttps://api.openai.com/v1OPENAI_API_KEYcurl https://api.openai.com/v1/chat/completions \
-H "Authorization: Bearer $OPENAI_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "gpt-6.1-sol",
"messages": [{"role": "user", "content": "Hello"}]
}'Model strings follow each provider's naming convention; confirm the current id in the OpenAI docs before relying on it.
What a GPT-6.1 Sol API call actually costs
Blended input + output cost at GPT-6.1 Sol's list rates — useful yardsticks before you commit to volume.
GPT-6.1 Sol cost calculator
Enter your monthly volume to estimate the GPT-6.1 Sol bill. Runs entirely in your browser.
Peak/off-peak and long-context pricing are applied automatically where published. Cache-write, Batch/Flex and Fast-mode adjustments are not included. For the full multi-model breakdown, use the cost calculator.
OpenAI models — GPT-6.1 Sol in context
How GPT-6.1 Sol prices against its siblings. Cheapest reference cost first.
| Model | Input /1M | Output /1M | Cost / call* | Context | Type |
|---|---|---|---|---|---|
| GPT-6 Luna Efficient model for focused, high-volume tasks · >272K input uses long-context rates | $0.100 | $0.500 | $0.0006 | 1.05M | Fast / cheap |
| GPT-5.6 Luna Cost-sensitive, high-volume tier | $0.200 | $1.20 | $0.0014 | 1.05M | Balanced |
| GPT-5.4 nano Cheapest OpenAI tier | $0.200 | $1.25 | $0.0015 | 400K | Fast / cheap |
| GPT-5.4 mini | $0.750 | $4.50 | $0.0053 | 400K | Balanced |
| GPT-6.1 Sol Sol 6.1 · $0.10 cache reads · >272K input uses long-context rates | $2.00 | $10.00 | $0.012 | 1.05M | Flagship |
| GPT-6 Sol Complex coding and agentic workflows · >272K input uses long-context rates | $2.00 | $10.00 | $0.012 | 1.05M | Flagship |
| GPT-5.6 Terra Balances intelligence and cost | $2.00 | $12.00 | $0.014 | 1.05M | Flagship |
| GPT-5.4 Balanced flagship | $2.50 | $15.00 | $0.017 | 400K | Flagship |
| GPT-5.6 Sol Flagship for complex professional work | $4.00 | $20.00 | $0.024 | 1.05M | Flagship |
| GPT-5.5 Flagship | $5.00 | $30.00 | $0.035 | 400K | Flagship |
| GPT-6 Astra Also called GPT-6 or Astra · >272K input uses long-context rates | $10.00 | $50.00 | $0.060 | 1.05M | Flagship |
*Reference cost of one call with 1,000 input + 1,000 output tokens — a neutral yardstick. Use the calculator for your real usage. Cheapest row highlighted.
OpenAI Sol 6.1 API pricing and Codex access
GPT-6.1 Sol is the model covered by this Sol 6.1 pricing page. Use gpt-6.1-sol as the API model ID. Searches for “GPT 6.1” or “OpenAI Sol 6.1” can refer to this model; the numbers here apply specifically to its API usage.
The official release announcement also lists availability in Codex and ChatGPT Work. Codex plan limits and subscription billing are separate from these API token prices. For tool calling, use the Responses API; Chat Completions supports this model without tool calling.
Billable reasoning tokens count toward output cost. Regional processing adds a 10% premium where available; the estimator excludes that premium. Sol 6.1 Fast is unavailable with EU data residency. Use the Sol 6.1 vs Sol 6 price comparison to include cache writes and processing modes in your estimate.
How GPT-6.1 Sol pricing works
GPT-6.1 Sol is billed per token: a lower input price of $2.00 per million tokens for everything you send, and a higher output price of $10.00 per million for everything the model generates. To turn that into a real GPT-6.1 Sol bill, multiply by your monthly request volume and average prompt/response length — the calculator above does exactly that.
Prompt caching is the biggest lever on your GPT-6.1 Sol cost: cached input tokens bill at just $0.100 per million — about 95% cheaper. If you reuse a long system prompt or context across calls, caching can dramatically cut the input portion of your bill.
Long context: once input exceeds 272K, the provider prices the full request at 2× input/cache rates and 1.5× output rates. Cache writes are $2.50 per million at Standard rates.
List prices move fast — always confirm the current numbers on the official OpenAI pricing page before relying on them for budgeting.
GPT-6.1 Sol pricing FAQ
How much does the GPT-6.1 Sol API cost?
GPT-6.1 Sol costs $2.00 per 1M input tokens and $10.00 per 1M output tokens, with cached input at $0.100 per 1M (about 95% off). Prompts above 272K use 2× input/cache rates and 1.5× output rates for the full request. A typical 3K-input / 500-output call at the displayed rate works out to about $0.011.
What is GPT-6.1 Sol's context window?
GPT-6.1 Sol has a 1.05M-token context window. Standard uncached input is $2.00 per 1M tokens for prompts up to 272K input tokens. Above that threshold, the full request uses $4.00 per 1M uncached input, 2× cache rates and 1.5× output rates.
Does GPT-6.1 Sol support prompt caching?
Yes. At Standard rates, GPT-6.1 Sol bills cache-read tokens at $0.100 per 1M instead of $2.00 uncached — roughly 95% cheaper for the repeated part of your prompts. Above 272K input tokens, both rates are multiplied by 2 for the full request. Cache writes have a separate $2.50 per 1M Standard rate.
Is there a cheaper alternative to GPT-6.1 Sol?
In the same flagship tier, MiniMax-M3 (MiniMax) is cheaper at $0.300 in / $1.20 out. For the 1K-input / 1K-output reference workload, the lowest-cost model tracked in this catalog is Gemini 1.5 Flash-8B.