--- title: "GPT-5.6 Luna Pro AI model: facts and benchmarks | Kendr" canonical: "https://kendr.org/models/openai-gpt-5-6-luna-pro" date_modified: "2026-08-12" profile_kind: "reference" --- # GPT-5.6 Luna Pro model profile GPT-5.6 Luna Pro is a OpenAI model profile with a 1,050,000-token context window. The dated catalog snapshot records file, image, text modalities and interfaces for file input, prompt caching, reasoning controls, structured output, text generation. GPT-5.6 Luna Pro is an independent knowledge profile. It does not claim that Kendr hosts the model, quote a Kendr customer price, promise API availability, or advertise a Kendr routing receipt. GPT-5.6 Luna Pro accepts file, image, and text and returns text. The snapshot records file input, prompt caching, reasoning controls, structured output, text generation, tool calling, vision, and web search pricing as capabilities or interfaces. The dated reference snapshot lists $0.1 input and $0.6 output per million tokens. Cached input is $0.01 per million tokens. No comparable third-party benchmark value is present in the 2026-08-12 snapshot. Missing values are not estimated. GPT-5.6 Luna Pro ranked #21 in the cited trailing-7-day third-party catalog usage dataset as of 2026-08-12. Observed within the cited trailing-7-day third-party catalog usage dataset; this is not global AI market share. Profile data was reviewed for the 2026-08-12 snapshot. Claims retain their source dates, and unavailable fields are shown as unavailable instead of estimated. ## Profile facts - **Profile type:** Model research profile - **Provider or publisher:** OpenAI - **Context window:** 1,050,000 tokens - **Snapshot date:** 2026-08-12 - **Reference catalog ID:** openai/gpt-5.6-luna-pro ## Context, modalities, and identity GPT-5.6 Luna Pro accepts file, image, and text and returns text. The snapshot records file input, prompt caching, reasoning controls, structured output, text generation, tool calling, vision, and web search pricing as capabilities or interfaces. - **Provider or publisher:** OpenAI - **Context window:** 1,050,000 tokens - **Maximum output:** 128,000 tokens - **Input modalities:** file, image, and text - **Output modalities:** text - **Knowledge cutoff:** 2026-02-16 ## Capabilities and supported controls Capabilities and parameters are reported from the dated catalog and source records; their presence does not guarantee identical behavior across every provider route. - **Supported parameters:** include_reasoning, max_completion_tokens, max_tokens, reasoning, reasoning_effort, response_format, seed, structured_outputs, tool_choice, tools - file input - prompt caching - reasoning controls - structured output - text generation - tool calling - vision - web search pricing ## Dated pricing snapshot The dated reference snapshot lists $0.1 input and $0.6 output per million tokens. Cached input is $0.01 per million tokens. These are dated third-party reference prices, not Kendr prices or an availability offer. Routes, tiers, caching, region, and provider policy can change the landed price. - **Price date:** 2026-08-12 - **Input:** $0.1 per 1M tokens - **Cached input:** $0.01 per 1M tokens - **Output:** $0.6 per 1M tokens | Prompt threshold | Input | Cached input | Output | | --- | --- | --- | --- | | From 272,000 prompt tokens | $0.2 / 1M | $0.02 / 1M | $0.9 / 1M | ## Benchmark evidence and limitations No comparable third-party benchmark value is present in the 2026-08-12 snapshot. Missing values are not estimated. Third-party catalog fields normalized from the cited model dataset; benchmark methodology and coverage differ by source. ## Popularity and market context GPT-5.6 Luna Pro ranked #21 in the cited trailing-7-day third-party catalog usage dataset as of 2026-08-12. Observed within the cited trailing-7-day third-party catalog usage dataset; this is not global AI market share. - **Third-party catalog rank:** #21 - **Global market share:** Not inferred - **Observation date:** 2026-08-12 ## Frequently asked questions ### What is GPT-5.6 Luna Pro? GPT-5.6 Luna Pro is a OpenAI model profile with a 1,050,000-token context window. The dated catalog snapshot records file, image, text modalities and interfaces for file input, prompt caching, reasoning controls, structured output, text generation. ### What context window does GPT-5.6 Luna Pro have? The dated profile lists 1,050,000 tokens of context and up to 128,000 output tokens. Provider routes, variants, and runtime configuration can impose lower effective limits. ### What benchmark evidence is available for GPT-5.6 Luna Pro? No comparable third-party benchmark value is present in the 2026-08-12 snapshot. Missing values are not estimated. Third-party catalog fields normalized from the cited model dataset; benchmark methodology and coverage differ by source. ### Is GPT-5.6 Luna Pro available through Kendr? This is an independent knowledge profile, not a Kendr-hosted availability claim. Check Kendr's live public model API for currently enabled Kendr aliases. ### Does the popularity rank represent GPT-5.6 Luna Pro's global market share? GPT-5.6 Luna Pro ranked #21 in the cited trailing-7-day third-party catalog usage dataset as of 2026-08-12. Observed within the cited trailing-7-day third-party catalog usage dataset; this is not global AI market share. No global market-share percentage is inferred when the source does not publish one. ## Sources and evidence dates - [GPT-5.6 Luna Pro third-party catalog record](https://openrouter.ai/openai/gpt-5.6-luna-pro) — catalog, checked 2026-08-12 - [Third-party model catalog methodology](https://openrouter.ai/docs/guides/overview/models) — methodology, checked 2026-08-12 - [OpenAI official model documentation](https://developers.openai.com/api/docs/models) — primary, checked 2026-08-12 Live Kendr operational availability is published separately at https://api.kendr.org/api/public/models.