--- title: "OpenAI: GPT-6 Luna — unrated, priced in this catalogue · Undominated.ai" canonical: https://undominated.ai/models/openai__gpt-6-luna/ description: "OpenAI: GPT-6 Luna: $0.100/M in, $0.500/M out. No independent quality score in this catalogue — unrated, not ranked, not scored zero." --- # OpenAI: GPT-6 Luna — unrated, priced in this catalogue · Undominated.ai > OpenAI: GPT-6 Luna: $0.100/M in, $0.500/M out. No independent quality score in this catalogue — unrated, not ranked, not scored zero. [Check base rates for this workload](/check/openai__gpt-6-luna/) [Cheaper alternatives](/alternatives/) [Family](/families/gpt-6/) [Compare models](https://undominated.ai/compare/?models=openai%2Fgpt-6-luna) Comparison context Choose up to three standard models in Compare. Requirements and prompt length apply in Compare. This page keeps its stated price basis and workload controls. MODEL PROOF # GPT-6 Luna OpenAI · 22 Sept 2026 Balanced Summarise Chat Code gen Agentic NOT INDEPENDENTLY RATED ## No independent LMArena score is published for this model. **$0.200** / 1M tokens Balanced · 3 tokens in per 1 out Base context tier shown; inspect the complete context ladder below. Evidence as of 23 Sept 2026 [openrouter/models](https://openrouter.ai/api/v1/models) Independent LMArena score Not independently rated Context window 1.05M Maximum output 128K Input modalities file, image, text Output modalities text Published input price $0.100 / 1M tokens Published output price $0.500 / 1M tokens Pricing kind fixed Context tiers Tiered by context Inspect [complete billing conditions](#billing-details) and endpoint terms below. Every price dimension · USD per million tokens | Input | $0.100 /M | | --- | --- | | Output | $0.500 /M | | Cached input | $0.010 /M | | Cache write | $0.125 /M | | Cache write 1h | Unknown /M | | Reasoning | Unknown /M | | Web search | $0.01 /call | **The headline rate does not apply to a long-context workload.** Complete context ladder · 1 tier | More than 272,000 tokens | $0.200 /M in (2×) $0.750 /M out $0.020 /M cached input $0.250 /M cache write | | --- | --- | ### Who sells it The same weights, different shops. Cheapest is not like-for-like when serving precision differs. 7 provider offers · rates, limits and conditions Rates are USD per million tokens. Endpoint terms can differ even when the quoted price and precision match. A listed parameter is a provider declaration, not a task-success test. | Seller | Input | Output | Precision | Uptime (1d) | | --- | --- | --- | --- | --- | | Seller OpenAI openai/flex Endpoint terms Cached input /M $0.0050 Context limit 1,050,000 tokens Output limit 128,000 tokens Tools Listed by endpoint Reasoning Listed by endpoint Promotional discount None reported Uptime · last 30 minutes 100.00% | Input $0.050 | Output $0.250 | Precision undeclared | Uptime (1d) 96.58% | | Seller OpenAI openai Endpoint terms Cached input /M $0.010 Context limit 1,050,000 tokens Output limit 128,000 tokens Tools Listed by endpoint Reasoning Listed by endpoint Promotional discount None reported Uptime · last 30 minutes 99.98% | Input $0.100 | Output $0.500 | Precision undeclared | Uptime (1d) 99.98% | | Seller Azure azure Endpoint terms Cached input /M $0.010 Context limit 1,050,000 tokens Output limit 128,000 tokens Tools Listed by endpoint Reasoning Listed by endpoint Promotional discount None reported Uptime · last 30 minutes 93.72% | Input $0.100 | Output $0.500 | Precision undeclared | Uptime (1d) 90.67% | | Seller Azure azure/us Endpoint terms Cached input /M $0.011 Context limit 1,050,000 tokens Output limit 128,000 tokens Tools Listed by endpoint Reasoning Listed by endpoint Promotional discount None reported Uptime · last 30 minutes 100.00% | Input $0.110 | Output $0.550 | Precision undeclared | Uptime (1d) 100.00% | | Seller Azure azure/eu Endpoint terms Cached input /M $0.011 Context limit 1,050,000 tokens Output limit 128,000 tokens Tools Listed by endpoint Reasoning Listed by endpoint Promotional discount None reported Uptime · last 30 minutes 100.00% | Input $0.110 | Output $0.550 | Precision undeclared | Uptime (1d) 100.00% | | Seller Amazon Bedrock amazon-bedrock/us-east-1 Endpoint terms Cached input /M $0.011 Context limit 1,050,000 tokens Output limit 128,000 tokens Tools Listed by endpoint Reasoning Listed by endpoint Promotional discount None reported Uptime · last 30 minutes 100.00% | Input $0.110 | Output $0.550 | Precision undeclared | Uptime (1d) 100.00% | | Seller OpenAI openai/fast Endpoint terms Cached input /M $0.020 Context limit 1,050,000 tokens Output limit 128,000 tokens Tools Listed by endpoint Reasoning Listed by endpoint Promotional discount None reported Uptime · last 30 minutes 100.00% | Input $0.200 | Output $1.00 | Precision undeclared | Uptime (1d) 100.00% | ### Independent scores No independent benchmark has measured this model. Unrated is not a score of zero. ### Capability | Context window | 1.1M | | --- | --- | | Max output | 128K | | Input modes | file, image, text | | Tool use | yes | | Reasoning | optional | | Open weights | Unknown | ### Provenance | Price source | [openrouter.ai](https://openrouter.ai/api/v1/models) | | --- | --- | | Fetched | 2026-09-23 | | Quality data | unrated | GPT-6 Luna is the fast, cost-efficient model in OpenAI's GPT-6 series, positioned below GPT-6 Sol. It is suited for high-volume and latency-sensitive workloads such as chat, classification, and lightweight agentic... ## Questions this page answers What does GPT-6 Luna cost? $0.100/M in, $0.500/M out in this catalogue, as of the fetch date on this page. That is the API row, not a subscription. Does GPT-6 Luna have an independent quality score? GPT-6 Luna has no independent quality score in this catalogue. Unrated is not a score of zero. What beats GPT-6 Luna? GPT-6 Luna has no independent quality score. Unrated is not a score of zero. Does this page use Artificial Analysis scores for GPT-6 Luna? No. Artificial Analysis figures are not published here. Quality on this page is LMArena Elo where a score exists; otherwise the row is unrated. Does a missing score mean GPT-6 Luna scored zero? Unrated is not a score of zero. MODEL MONUMENT ## Save or share this proof Download proof card · 1200 × 630 Preview and more sharing options OpenAI: GPT-6 Luna. Balanced workload. Not independently rated. Evidence as of 23 Sept 2026. Copy model link Download square card · 1080 × 1080 Copy landscape image Share landscape card ## Related No independent quality score, so there is no dominator to name. Unrated is not a clean bill of health. - Same vendor [GPT-5.5](/models/openai__gpt-5.5/) - OpenAI models [OpenAI](/providers/openai/) - Where this model appears [cliffs](/cliffs/) - Same vendor [GPT-5.6 Sol](/models/openai__gpt-5.6-sol/) - Where this model appears [spreads](/spreads/) - Same vendor [GPT-5.4](/models/openai__gpt-5.4/) - Where this model appears [plans](/plans/) ## Badge The verdict as one SVG, for a README or a docs page. It states this model's dominance status at the balanced workload on the LMArena lens, with the date it was computed, and it is rebuilt with the catalogue — so it changes when the verdict changes, including to one you would rather it did not. Markdown Copy [![GPT-6 Luna — Undominated.ai dominance verdict](https://undominated.ai/badge/openai__gpt-6-luna.svg)](https://undominated.ai/models/openai__gpt-6-luna/) HTML Copy GPT-6 Luna — Undominated.ai dominance verdict Direct file: [https://undominated.ai/badge/openai__gpt-6-luna.svg](https://undominated.ai/badge/openai__gpt-6-luna.svg) — a static SVG, written by scripts/build-badges.mjs on every build, so the copy you embed is never older than the last deploy. ## Continue your investigation - [Explore model families](/families/) - [Compare a shortlist](/compare/) - [Check a model](/check/) - [Understand the evidence](/methodology/)