OpenAI

GPT-6 Sol API pricing.

GPT-6 Sol is OpenAI’s model on the API market, released 22 Sept 2026. Prices are per million tokens in USD, as last read from the price list.

$2.00Input / 1M
$10Output / 1M
1.1MContext
128KMax output
Capability scores
Epoch AI
Maths3 of 4 benchmarks93
Science and knowledge2 of 2 benchmarks77
CodingNot tested by Epoch
Reasoning and puzzles2 of 2 benchmarks53
Agents and long tasks3 of 3 benchmarks34

Each bar is this model's score in that area. The white tick marks the best score any model Epoch has tested reaches there.

Epoch Capabilities Index
164
Range 161 to 167 · #9 of 271 models Epoch has scored
Maths
93average of 3 of 4 Epoch results
FrontierMath (tiers 1 to 3) (max)90%
FrontierMath (tier 4) (max)90%
OTIS Mock AIME (max)100.0%
Science and knowledge
77average of 2 of 2 Epoch results
GPQA Diamond (max)94%
SimpleQA Verified (max)61%
Reasoning and puzzles
53average of 2 of 2 Epoch results
Chess puzzles (max)56%
Mystery game puzzles (max)56%
Agents and long tasks
34average of 3 of 3 Epoch results
Furniture assembly (max)58%
EBR-bench (game agent) (max)53%
SpireClimb (game agent) (max)7.5%

The index combines many benchmarks into one general-capability score; the range is how sure Epoch is of the number. Each area score is this site's average of the model's Epoch results in that area, where 0 is what guessing would score and 100 is perfect. Compare every model, and value for money →

Source: Epoch AI, Capabilities & benchmarking (licensed CC BY 4.0). Data refreshed 2 November 2026. These are Epoch's own tests; other benchmark sites can rank models differently.

Cheaper models that come close
Our working on Epoch's index
  1. Claude Haiku 5.5 · Anthropicindex 160.37 (3 below) · 95% cheaper
  2. DeepSeek V4.1 Flash 1017 · DeepSeekindex 158.83 (5 below) · 93% cheaper
  3. GPT-6.1 Terra · OpenAIindex 168.11 · 50% cheaper

Models within 5 points of GPT-6 Sol on Epoch's Capabilities Index that cost less, comparing a typical chat mix (three parts input to one part output). A few points of index is a small difference and says nothing about your task: a place to start testing, not a verdict. Capability against price for every model.

Specification
USD per million tokens
Provider
OpenAI
Model id
openai/gpt-6-sol
Input
$2.00
Output
$10
Cached input
$0.20
Context window
1.1M tokens
Maximum output
128K tokens
Takes
file, image, text
Returns
text
Tool use
Yes
Reasoning
Yes
Released
22 Sept 2026
First tracked
22 Sept 2026

At $2.00 per million input tokens, GPT-6 Sol is dearer than 264 of the 340 models on the price list.

Price changes
Tracked since 17 Sept 2026

No price change has been recorded since tracking began on 17 Sept 2026. Prices are checked every six hours, and any change is listed here and on model changes.

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Coverage
6 stories
  1. AI Business ·
    OpenAI takes AI price war to next level with GPT-6 Sol, Luna pricing
  2. Simon Willison's Weblog ·
    Claude Opus 5.5, GPT-6 Sol, GPT-6 Luna, and a new price war
  3. The Decoder ·
    OpenAI's GPT-6 Sol and Luna cut prices in half but barely move the needle on performance
  4. AWS Machine Learning Blog ·
    Bring more intelligence to everyday work with GPT-6 Sol and GPT-6 Luna on Amazon Bedrock
  5. TechCrunch AI ·
    OpenAI launches GPT-6 Sol and Luna, boasting lower cost and fewer mistakes
  6. OpenAI News ·
    Introducing GPT-6 Sol and Luna
Other entries for this model
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Prices and specifications come from OpenRouter’s catalogue, last read 2 Nov 2026. A provider’s own price may differ; how this is collected.