GPT-5.6 Luna

A cost-efficient GPT-5.6 model optimized for high-volume reasoning and tool-use workloads.

Input price
$0.18–$0.36list $0.20-10%
Output price
$1.08–$1.62list $1.20-10%
Context
1.1M
Max output
128K
Modalities
InputTextImageOutputText
157 (#27 of 89)
1431
—
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 tokens
Inputper 1M tokens$0.18list $0.20-10%$0.09list $0.10-10%$0.09list $0.10-10%$0.36list $0.40-10%—
Outputper 1M tokens$1.08list $1.20-10%$0.54list $0.60-10%$0.54list $0.60-10%$2.16list $2.40-10%—
Cache readper 1M tokens$0.018list $0.02-10%$0.009list $0.01-10%$0.009list $0.01-10%$0.036list $0.04-10%—
Cache write (5 min)per 1M tokens$0.225list $0.25-10%$0.1125list $0.125-10%$0.1125list $0.125-10%$0.45list $0.50-10%—
Cache write (1 hour)per 1M tokens$0.45list $0.50-10%$0.225list $0.25-10%$0.225list $0.25-10%$0.90list $1.00-10%—
Prompt > 272K tokens
Inputper 1M tokens$0.36list $0.40-10%$0.18list $0.20-10%$0.18list $0.20-10%$0.72list $0.80-10%—
Outputper 1M tokens$1.62list $1.80-10%$0.81list $0.90-10%$0.81list $0.90-10%$3.24list $3.60-10%—
Cache readper 1M tokens$0.036list $0.04-10%$0.018list $0.02-10%$0.018list $0.02-10%$0.072list $0.08-10%—
Cache write (5 min)per 1M tokens$0.45list $0.50-10%$0.225list $0.25-10%$0.225list $0.25-10%$0.90list $1.00-10%—
Cache write (1 hour)per 1M tokens$0.90list $1.00-10%$0.45list $0.50-10%$0.45list $0.50-10%$1.80list $2.00-10%—
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-luna",
    "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
  • This model
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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 LunaThis model
157
Input
$0.18–$0.36
Output
$1.08–$1.62
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Output
$1.125
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Mistral Small
—
Input
$0.165
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Qwen3 Coder 30B A3B Instruct
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Input
$0.165
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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