AI model reference · 2026
GPT-5.6 Luna Pro
GPT-5.6 Luna Pro is the same underlying model as GPT-5.6 Luna, served with reasoning.mode set to pro for higher-quality responses on complex tasks.
- Context window
- 1,050,000 tokens
- Maximum output
- 128,000 tokens
- Base provider API input
- $0.20 / 1M tokens
- Starting provider API rate; context tiers apply
- Published evidence
- Not available
Overview
About GPT-5.6 Luna Pro
A concise catalog overview. Technical limits and published evaluation evidence are listed separately below.
GPT-5.6 Luna Pro is the same underlying model as GPT-5.6 Luna, served with reasoning.mode set to pro for higher-quality responses on complex tasks.
Published evaluations
Benchmark results
Only results mapped to this exact model and backed by a named source appear here. Different evaluation protocols are not treated as interchangeable.
No reviewed benchmark result is available for this exact model yet. We leave this section empty instead of assigning a nearby model’s score.
Human preference
Arena results
Arena scores come from blind human preference votes. They are reported separately from task benchmarks and are not used as substitutes for missing benchmark results.
No exact Arena match is available for this model. Similar names and provider variants are not merged automatically.
Technical reference
Specifications and API facts
Technical limits and reference provider prices come from the current catalog unless a reviewed external source is listed. Missing values stay marked as unavailable.
- Provider
- OpenAI
- Release date
- Not available in reviewed sources
- Catalog added
- Jul 9, 2026
- Context window
- 1,050,000 tokens
- Maximum output
- 128,000 tokens
- Knowledge cutoff
- 2026-02-16
- License
- Not available in reviewed sources
- Input types
- File, Image, Text
- Output types
- Text
- Reasoning
- Supported
- Provider endpoint tool parameters
- Accepts tool parameters
- Base provider API input
- $0.20 / 1M tokens
- Base provider cached input
- $0.02 / 1M tokens
- Base provider API output
- $1.20 / 1M tokens
- Provider tier at ≥ 272,000 prompt tokens
- Input $0.40 / 1M tokensOutput $1.80 / 1M tokensCached input $0.04 / 1M tokens
Provider token rates are context-dependent. The base rates apply below the listed prompt thresholds; the matching tier applies at or above each threshold.
These are reference provider API rates, not Writingmate checkout charges. Access in Writingmate follows the allowances of your Writingmate plan.
Provenance
Sources and update status
Source links are attached to the facts and evaluations they support. Catalog-only values are not presented as independently verified claims.
Evidence update date is not available.
Catalog record updated Jul 9, 2026.
Catalog-added dates describe when a model entered the catalog, not necessarily its public release date.
Keep exploring
Related models and comparisons
Open another model’s detail page or compare it directly with GPT-5.6 Luna Pro. Suggestions come from the current catalog.
GLM 5.3
Z.AI
GLM-5.3 is a large-scale reasoning model from Z.ai, built for complex software engineering and long-horizon agent tasks.
Qwen3.8 27B
Qwen
Qwen3.8 27B is an open-weight dense vision-language model from Qwen.
Seedream 5.0 Lite
ByteDance
Seedream 5.0 Lite is an image generation model from ByteDance Seed.
Gemini 3.7 Flash
Gemini 3.7 Flash is a multimodal model from Google for fast agentic workflows, coding, and complex multi-step reasoning.
Seedream 5.0 Pro
ByteDance
Seedream 5.0 Pro is an image generation and editing model from ByteDance Seed.
Seedance 2.0 Mini
ByteDance
Seedance 2.0 Mini is a video generation model from ByteDance.
Try GPT-5.6 Luna Pro in Writingmate
Use this model, then compare its response with other AI models in the same workspace.