Pricingby GlyphGPT-5.6 Sol is the flagship model in OpenAI's GPT-5.6 series.
Ways to buy 8
| Way to buy | Input | Output | In / out per 1M | Cached | Vs list |
|---|---|---|---|---|---|
flex, cheapest · cached $0.2 | $2 | $10 | $2 / $10-50% vs list | $0.2 | -50% vs list |
The lab's own API · cached $0.4 | $4 | $20 | $4 / $20List price | $0.4 | List price |
 AWS Bedrockglobal · cached $0.4 | $4 | $20 | $4 / $20Same as list | $0.4 | Same as list |
Default region · cached $0.4 | $4 | $20 | $4 / $20Same as list | $0.4 | Same as list |
| AWS Bedrock us-east-1 · cached $0.44 | $4.4 | $22 | $4.4 / $22+10% vs list | $0.44 | +10% vs list |
eu · cached $0.44 | $4.4 | $22 | $4.4 / $22+10% vs list | $0.44 | +10% vs list |
us · cached $0.44 | $4.4 | $22 | $4.4 / $22+10% vs list | $0.44 | +10% vs list |
fast · cached $0.8 | $8 | $40 | $8 / $40+100% vs list | $0.8 | +100% vs list |
USD per 1M tokens; batch $2 in, $10 out on the lab's API. Regions are separate routes.
Through a gateway
Your own numbers100M input and 20M output tokens a month: $800.00 direct.
Kong AI Gateway$800.00+0%
LiteLLM$800.00+0%
Neon AI Gateway$800.00+0%
Vercel AI Gateway$800.00+0%
Cloudflare AI Gateway$840.00+5%
Requesty$840.00+5%
Eden AI$844.00+5.5%
OpenRouter$844.00+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. |
Anthropic · 1M | $5 | $25 | $5 / $25 | $10 | 1M | Lab list price | · | Claude Opus 5 is Anthropic’s flagship model for demanding reasoning, coding, and long-horizon agentic work. |
About GPT-5.6 Sol
Takes files, image, text in and returns text. First listed Jul 17, 2026. Up to 128K output tokens. Blended price $8 per 1M tokens at 3 input to 1 output. Overall score 18 on leadersboard.fru.dev (rank 10). Model id gpt-5-6-sol.
Price history
List price since Jul 17, 2026, from Internet Archive snapshots of the OpenRouter catalog, then daily reads.
GPT-5.6 Sol
OpenAI (fast) raised its price: input $4 to $8 and output $20 to $40 per 1M tokens.
OpenAI raised its API price: input $2 to $4 and output $10 to $20 per 1M tokens.
OpenAI (flex) raised its price: input $1 to $2 and output $5 to $10 per 1M tokens.
OpenAI cut its API price: input $2.5 to $2 and output $15 to $10 per 1M tokens.
OpenAI cut its API price: input $5 to $2.5 and output $30 to $15 per 1M tokens.
Questions
How much does GPT-5.6 Sol cost?
$4 per million input tokens and $20 per million output tokens, with cached input at $0.4, or $2 and $10 through the Batch API.
What is the context window of GPT-5.6 Sol?
1.05M tokens, with up to 128K tokens of output.
Where is GPT-5.6 Sol cheapest?
Of 8 routes tracked, OpenAI is cheapest at $2 input and $10 output per million tokens.
Has GPT-5.6 Sol's price changed?
Yes. The output price went from $20 to $40, first seen Oct 23, 2026.