LLM prices per 1M tokens

264 models · 161 price changes

GPT-6 Sol Pro

OpenAI · Reasoning · 1.05M context · released Sep 22, 2026 · checked 12h ago

GPT-6 Sol Pro is the same underlying model as GPT-6 Sol, served with reasoning.mode set to pro for higher-quality responses on complex tasks.

Ways to buy 6

Way to buyIn / out per 1M
OpenAI
flex, cheapest · cached $0.1
$1 / $5-50% vs list
OpenAI API
The lab's own API · cached $0.2
$2 / $10List price
Azure AI Foundry
Default region · cached $0.2
$2 / $10Same as list
Azure AI Foundry
eu · cached $0.22
$2.2 / $11+10% vs list
Azure AI Foundry
us · cached $0.22
$2.2 / $11+10% vs list
OpenAI
fast · cached $0.4
$4 / $20+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 numbers

100M input and 20M output tokens a month: $400.00 direct.

A dash: not on that gateway's own model list. No published token fee: Portkey, TrueFoundry AI Gateway.

Related models

In / out per 1M
GPT-6.1 Terra
OpenAI · 1.05MCheapest: $1 on OpenAI (flex)
$1 / $5GPT-6.1 Terra is the mid-tier model in OpenAI's GPT-6.1 series, priced below GPT-6.1 Sol.
GPT-6.1 Terra Pro
OpenAI · 1.05MCheapest: $1 on OpenAI (flex)
$1 / $5GPT-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.
GPT-6.1 Sol
OpenAI · 1.05MCheapest: $2 on OpenAI (flex)
$2 / $10GPT-6.1 Sol is an upgrade to GPT-6 Sol from OpenAI, positioned below the flagship GPT-6 Astra in the GPT-6 series.
GPT-6.1 Sol Pro
OpenAI · 1.05MCheapest: $2 on OpenAI (flex)
$2 / $10GPT-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.
Claude Opus 5.5
Anthropic · 1M
$4 / $20Claude Opus 5.5 is Anthropic's flagship model for demanding reasoning, coding, and long-horizon agentic work, succeeding Claude Opus 5.
Gemini 4 Argon
Google · 1MCheapest: $2 on Google Gemini API (flex)
$2 / $10Gemini 4 Argon is Google's flagship reasoning model, built for complex software engineering, deep mathematical and scientific problem solving, and autonomous multi-step agents.
Claude Sonnet 5.5
Anthropic · 1M
$2 / $10Claude Sonnet 5.5 is Anthropic's Sonnet-class model for well-scoped everyday work, succeeding Claude Sonnet 5 as a direct upgrade.
Muse Spark 1.1
Meta · 1M
$1.25 / $4.25Muse Spark 1.1 is a multimodal reasoning model from Meta, built for agentic tasks.

About GPT-6 Sol Pro

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. Model id gpt-6-sol-pro.

Price history

$3$10Sep 23, 2026Output $10Input $2

List price since Sep 23, 2026, from daily reads of the OpenRouter catalog.

Questions

How much does GPT-6 Sol Pro 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 Pro?

1.05M tokens, with up to 128K tokens of output.

Where is GPT-6 Sol Pro cheapest?

Of 6 routes tracked, OpenAI is cheapest at $1 input and $5 output per million tokens.