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GPT-5.6 Luna openai
Release timeline
Stages observed by the nightly radar: announced → API only → weights public → served by third parties. Each entry carries the source it was seen at.
- 2026-07-09 · API only source seeded from the earliest dated observation when first seen · observed 2026-10-07 20:20 UTC
Description
GPT-5.6 Luna is a fast, cost-efficient model in OpenAI's GPT-5.6 series. It is suited for high-volume, latency-sensitive tasks such as chat, classification, and lightweight agentic workflows, providing capable reasoning for...
via OpenRouter listing · observed 2026-10-24 21:26 UTC. The listing text is the provider's own description, not an assessment.
Where to run 3 providers · 7 endpoints
Hosted endpoints observed for GPT-5.6 Luna, sorted by input price (USD per million tokens). Each row names its observer and date; prices change daily, so check the source before quoting. Cheapest observed input price: $0.10/M.
| Provider | Model ref | Context | Quant | $/M in | $/M out | tok/s | TTFT | Tools | Status | Observed |
|---|---|---|---|---|---|---|---|---|---|---|
| OpenAI openrouter | openai/gpt-5.6-luna | 1.0M | unknown | $0.10 | $0.60 | — | — | yes | live | 2026-10-24 |
| Azure openrouter | openai/gpt-5.6-luna | 1.0M | unknown | $0.20 | $1.20 | — | — | yes | live | 2026-10-24 |
| OpenAI openrouter | openai/gpt-5.6-luna | 1.0M | unknown | $0.20 | $1.20 | — | — | yes | live | 2026-10-24 |
| Amazon Bedrock openrouter | openai/gpt-5.6-luna | 1.0M | unknown | $0.22 | $1.32 | — | — | yes | live | 2026-10-24 |
| Azure openrouter | openai/gpt-5.6-luna | 1.0M | unknown | $0.22 | $1.32 | — | — | yes | live | 2026-10-24 |
| Azure openrouter | openai/gpt-5.6-luna | 1.0M | unknown | $0.22 | $1.32 | — | — | yes | live | 2026-10-24 |
| OpenAI openrouter | openai/gpt-5.6-luna | 1.0M | unknown | $0.40 | $2.40 | — | — | yes | live | 2026-10-24 |
Third-party providers observed: 1 (Amazon Bedrock). Cache-read price $0.02/M (source, observed 2026-10-24).
Facts
| Context length | 1,050,000 tokens (1.0M) · OpenRouter listing |
|---|---|
| Modalities | file + image + text → text |
| Max completion tokens | 128,000 |
| Knowledge cutoff | 2026-02-16 |
| Supported parameters | include_reasoning, max_completion_tokens, max_tokens, reasoning, reasoning_effort, response_format, seed, structured_outputs, tool_choice, tools, verbosity |
| Openness | Closed weights · closed lab |
| Stage | API only |
| Confidence | medium |
| Pricing (USD per M tokens) |
in $0.20 · out $1.20 · cache read $0.02 OpenRouter list price (cheapest live endpoint) · source · observed 2026-10-24 21:26 UTC |
Open alternatives 5
Nearest open-weights models by modality, context and price on this watch list. Not a quality ranking.
| Model | Org | Params | Context | $/M in | License | Why it is here |
|---|---|---|---|---|---|---|
| Kimi-K3 | moonshotai | 2.78T | 1M | $0.23 | other | similar context (1.05M), vision input |
| MiniMax-M3 | MiniMaxAI | 427B | 1M | $0.22 | other | similar context (1.05M), vision input |
| DeepSeek-V4.1-Flash-1017 | deepseek-ai | 763B | 1M | $0.20 | mit | similar context (1.05M), vision input |
| GLM-5.3-Flash | zai-org | 321B | 1M | $0.02 | mit | similar context (1.05M), cheaper input price ($0.0175/M vs $0.2/M), vision input |
| DeepSeek-V4.1-Flash | deepseek-ai | 763B | 1M | $0.02 | mit | similar context (1.05M), cheaper input price ($0.02/M vs $0.2/M), vision input |
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- /feeds/upcoming.json(JSON Feed 1.1) · same, JSON Feed 1.1
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Sources
- openrouter openai/gpt-5.6-luna · observed 2026-10-24 21:26 UTC
Radar run: 2026-10-25 06:51 UTC · Last verified 2026-10-25 06:51 UTC