GPT-6 Sol is the cost-efficient high-end model in OpenAI's GPT-6 series, positioned below the flagship GPT-6 Astra and above the fast GPT-6 Luna tier.
Ways to buy 8
| Way to buy | Input | Output | In / out per 1M | Cached | Vs list |
|---|---|---|---|---|---|
flex, cheapest · cached $0.1 | $1 | $5 | $1 / $5-50% vs list | $0.1 | -50% vs list |
The lab's own API · cached $0.2 | $2 | $10 | $2 / $10List price | $0.2 | List price |
global · cached $0.2 | $2 | $10 | $2 / $10Same as list | $0.2 | Same as list |
Default region · cached $0.2 | $2 | $10 | $2 / $10Same as list | $0.2 | Same as list |
us-east-1 · cached $0.22 | $2.2 | $11 | $2.2 / $11+10% vs list | $0.22 | +10% vs list |
eu · cached $0.22 | $2.2 | $11 | $2.2 / $11+10% vs list | $0.22 | +10% vs list |
us · cached $0.22 | $2.2 | $11 | $2.2 / $11+10% vs list | $0.22 | +10% vs list |
fast · cached $0.4 | $4 | $20 | $4 / $20+100% vs list | $0.4 | +100% vs list |
USD per 1M tokens; batch $1 in, $5 out on the lab's API. Regions are separate routes.
Through a gateway
Your own numbers100M input and 20M output tokens a month: $400.00 direct.
Kong AI Gateway$400.00+0%
LiteLLM$400.00+0%
Neon AI Gateway$400.00+0%
Vercel AI Gateway$400.00+0%
Cloudflare AI Gateway$420.00+5%
Requesty$420.00+5%
Eden AI$422.00+5.5%
OpenRouter$422.00+5.5%
HeliconeNot offeredNot offered
A dash: not on that gateway's own model list. No published token fee: Martian Gateway, Portkey, TrueFoundry AI Gateway.
Related models
| In / out per 1M | Cheapest route | |||||||
|---|---|---|---|---|---|---|---|---|
OpenAI · 1.05MCheapest: $1 on OpenAI (flex) | $1 | $5 | $1 / $5 | $2 | 1.05M | $1 on OpenAI (flex) | · | GPT-6.1 Terra is the mid-tier model in OpenAI's GPT-6.1 series, priced below GPT-6.1 Sol. |
OpenAI · 1.05MCheapest: $1 on OpenAI (flex) | $1 | $5 | $1 / $5 | $2 | 1.05M | $1 on OpenAI (flex) | · | GPT-6.1 Terra Pro is the same underlying model as GPT-6.1 Terra, served with reasoning.mode set to pro for higher-quality responses on complex tasks. |
OpenAI · 1.05MCheapest: $2 on OpenAI (flex) | $2 | $10 | $2 / $10 | $4 | 1.05M | $2 on OpenAI (flex) | · | 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. |
OpenAI · 1.05MCheapest: $2 on OpenAI (flex) | $2 | $10 | $2 / $10 | $4 | 1.05M | $2 on OpenAI (flex) | · | GPT-6.1 Sol Pro is the same underlying model as GPT-6.1 Sol, served with reasoning.mode set to pro for higher-quality responses on complex tasks. |
Anthropic · 1M | $4 | $20 | $4 / $20 | $8 | 1M | Lab list price | · | Claude Opus 5.5 is Anthropic's flagship model for demanding reasoning, coding, and long-horizon agentic work, succeeding Claude Opus 5. |
Google · 1MCheapest: $2 on Google Gemini API (flex) | $2 | $10 | $2 / $10 | $4 | 1M | $2 on Google Gemini API (flex) | · | Gemini 4 Argon is Google's flagship reasoning model, built for complex software engineering, deep mathematical and scientific problem solving, and autonomous multi-step agents. |
Anthropic · 1M | $2 | $10 | $2 / $10 | $4 | 1M | Lab list price | · | Claude Sonnet 5.5 is Anthropic's Sonnet-class model for well-scoped everyday work, succeeding Claude Sonnet 5 as a direct upgrade. |
Meta · 1M | $1.25 | $4.25 | $1.25 / $4.25 | $2 | 1M | Lab list price | · | Muse Spark 1.1 is a multimodal reasoning model from Meta, built for agentic tasks. |
About GPT-6 Sol
Takes files, image, text in and returns text. First listed Sep 23, 2026. Up to 128K output tokens. Blended price $4 per 1M tokens at 3 input to 1 output. Overall score 9 on leadersboard.fru.dev (rank 19). Model id gpt-6-sol.
Price history
List price since Sep 23, 2026, from daily reads of the OpenRouter catalog.
Questions
How much does GPT-6 Sol cost?
$2 per million input tokens and $10 per million output tokens, with cached input at $0.2, or $1 and $5 through the Batch API.
What is the context window of GPT-6 Sol?
1.05M tokens, with up to 128K tokens of output.
Where is GPT-6 Sol cheapest?
Of 8 routes tracked, OpenAI is cheapest at $1 input and $5 output per million tokens.