GPT-5.6 Sol

The frontier GPT-5.6 model for complex reasoning, coding, tool use, and demanding production workflows.

Input price
$3.60–$7.20list $4.00-10%
Output price
$18.00–$27.00list $20.00-10%
Context
1.1M
Max output
128K
Modalities
InputTextImageOutputText
163 (#12 of 89)
1457
—
Released
2026-07-09
Knowledge cutoff
2026-02-16
Try in ChatCompare

Providers

This model is served by the dedicated providers below. We pick the provider for each request, so provider preferences don’t apply, including a provider named in your request. Prices in USD per 1M tokens. Need a custom setup? Contact [email protected].

Included providers2
  • SuccessTTFT
  • Azure AI FoundryGlobal——
  • OpenAIUnited States——

Pricing

Prices for this model. Each request is billed at these prices, whichever provider serves it.

ItemStandardFlexBatchPriorityPrice
Prompt ≤ 272K tokensfrom 2026-08-21until 2026-11-21
Inputper 1M tokens$3.60list $4.00-10%$1.80list $2.00-10%$1.80list $2.00-10%$7.20list $8.00-10%—
Outputper 1M tokens$18.00list $20.00-10%$9.00list $10.00-10%$9.00list $10.00-10%$36.00list $40.00-10%—
Cache readper 1M tokens$0.36list $0.40-10%$0.18list $0.20-10%$0.18list $0.20-10%$0.72list $0.80-10%—
Cache write (5 min)per 1M tokens$4.50list $5.00-10%$2.25list $2.50-10%$2.25list $2.50-10%$9.00list $10.00-10%—
Cache write (1 hour)per 1M tokens$9.00list $10.00-10%$4.50list $5.00-10%$4.50list $5.00-10%$18.00list $20.00-10%—
Prompt > 272K tokensfrom 2026-08-21until 2026-11-21
Inputper 1M tokens$7.20list $8.00-10%$3.60list $4.00-10%$3.60list $4.00-10%$14.40list $16.00-10%—
Outputper 1M tokens$27.00list $30.00-10%$13.50list $15.00-10%$13.50list $15.00-10%$54.00list $60.00-10%—
Cache readper 1M tokens$0.72list $0.80-10%$0.36list $0.40-10%$0.36list $0.40-10%$1.44list $1.60-10%—
Cache write (5 min)per 1M tokens$9.00list $10.00-10%$4.50list $5.00-10%$4.50list $5.00-10%$18.00list $20.00-10%—
Cache write (1 hour)per 1M tokens$18.00list $20.00-10%$9.00list $10.00-10%$9.00list $10.00-10%$36.00list $40.00-10%—
Prompt ≤ 272K tokensfrom 2026-11-21
Inputper 1M tokens$4.50list $5.00-10%$2.25list $2.50-10%$2.25list $2.50-10%$9.00list $10.00-10%—
Outputper 1M tokens$27.00list $30.00-10%$13.50list $15.00-10%$13.50list $15.00-10%$54.00list $60.00-10%—
Cache readper 1M tokens$0.45list $0.50-10%$0.225list $0.25-10%$0.225list $0.25-10%$0.90list $1.00-10%—
Cache write (5 min)per 1M tokens$5.625list $6.25-10%$2.8125list $3.125-10%$2.8125list $3.125-10%$11.25list $12.50-10%—
Cache write (1 hour)per 1M tokens$11.25list $12.50-10%$5.625list $6.25-10%$5.625list $6.25-10%$22.50list $25.00-10%—
Prompt > 272K tokensfrom 2026-11-21
Inputper 1M tokens$9.00list $10.00-10%$4.50list $5.00-10%$4.50list $5.00-10%$18.00list $20.00-10%—
Outputper 1M tokens$40.50list $45.00-10%$20.25list $22.50-10%$20.25list $22.50-10%$81.00list $90.00-10%—
Cache readper 1M tokens$0.90list $1.00-10%$0.45list $0.50-10%$0.45list $0.50-10%$1.80list $2.00-10%—
Cache write (5 min)per 1M tokens$11.25list $12.50-10%$5.625list $6.25-10%$5.625list $6.25-10%$22.50list $25.00-10%—
Cache write (1 hour)per 1M tokens$22.50list $25.00-10%$11.25list $12.50-10%$11.25list $12.50-10%$45.00list $50.00-10%—
Web searchper request————$0.009list $0.01-10%

Make a request

Set your provider preferences, then copy the request. It reads your API key from OHMYGPT_API_KEY.

Provider preferences don’t apply to this model. Need a custom setup? Contact [email protected].

curl https://api.ohmygpt.com/v1/chat/completions \
  -H "Authorization: Bearer $OHMYGPT_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "openai/gpt-5.6-sol",
    "messages": [
      {
        "role": "user",
        "content": "Hello"
      }
    ]
  }'

Similar models

Other models with the same output types at a similar price.

  • Better value: more capable, lower price
  • Pareto frontier
  • Similar models

Capability scores are from Epoch AI’s Epoch Capabilities Index (CC BY 4.0, as of 2026-11-02), which combines dozens of benchmarks with GPT-5 set at 150. epoch.ai/eci

Price: our current input price per 1M tokens in USD, lowest across channels. Dated snapshots and resold copies of the same model are merged into one point; free models are not shown.

Shaded area: capability above and price below the median of all models. Pareto frontier: no other model is both cheaper and more capable.

GPT-5.6 SolThis model
163
Input
$3.60–$7.20
Output
$18.00–$27.00
GPT-5.6
—
Input
$3.60–$7.20
Output
$18.00–$27.00
Llama 3.1 405B Instruct
129
Input
$3.85
Output
$3.85
Claude Sonnet 4.6
153
Input
$3.30
Output
$16.50
Gemini 3.5 Transcribe Live
—
Input
$3.15
Output
$18.90

Human preference ratings are from the LMArena Text Arena (CC BY 4.0, as of 2026-10-28): Elo ratings from blind votes, on a different scale from capability scores. lmarena.ai/leaderboard/text