Migrating from gpt-5.6-luna to gpt-6-luna
What changes when you move from gpt-5.6-luna to gpt-6-luna: input price −50%, output price −58.3%.
- From
- gpt-5.6-luna
- Status
- Active
- Shutdown
- none announced
- Time left
- —
- Status
- Active
- Shutdown
- none announced
- Time left
- —
Prices
USD per 1M tokens, standard tier| Type | gpt-5.6-luna | gpt-6-luna | Change |
|---|---|---|---|
| Input | $0.20first seen October 1, 2026 · source | $0.10first seen October 1, 2026 · source | −50% |
| Cached input | $0.02first seen October 1, 2026 · source | $0.01first seen October 1, 2026 · source | −50% |
| Output | $1.20first seen October 1, 2026 · source | $0.50first seen October 1, 2026 · source | −58.3% |
At 1M input and 250K output tokens a month: $0.50 on gpt-5.6-luna, $0.225 on gpt-6-luna (−55%).
Other tiers, prompt-size bands and modalities are on each model's page.
Limits
Tokens| Limit | gpt-5.6-luna | gpt-6-luna | Change |
|---|---|---|---|
| Context window | 1,050,000 tokensin place when tracking began (October 7, 2026) · source | 1,050,000 tokensin place when tracking began (October 7, 2026) · source | 0% |
| Max output tokens | 128,000 tokensin place when tracking began (October 7, 2026) · source | 128,000 tokensin place when tracking began (October 7, 2026) · source | 0% |
Benchmarks
Same benchmark and source on both sides; settings named where they differ| Benchmark | gpt-5.6-luna | gpt-6-luna | Change |
|---|---|---|---|
| Arena TextArena, max effort (vs xhigh effort). Ranges don't overlap. | 1453 ±4 | 1443 ±5 | −10 |
| Arena Text: CodingArena, max effort (vs xhigh effort). | 1501 ±7 | 1507 ±7 | +6 within range |
| Arena WebDevArena, max effort (vs xhigh effort, codex harness). Ranges don't overlap. | 1518 ±6 | 1582 ±6 | +64 |
| Arena VisionArena, max effort (vs xhigh effort). | 1258 ±7 | 1241 ±12 | −17 within range |
| Arena AgentArena, max effort (vs xhigh effort). Ranges don't overlap. | -0.018 ±0.007 | 0.033 ±0.005 | +0.051 |
| FrontierMath Tier 4Epoch AI, max effort. | 61.0% | 56.1% | −4.9 pts |
| FrontierMath Tiers 1-3Epoch AI, max effort. | 82.1% | 78.9% | −3.2 pts |
| GPQA DiamondEpoch AI, max effort. | 91.6% | 90.5% | −1.1 pts |
| OTIS Mock AIME 2024-2025Epoch AI, max effort. | 98.3% | 98.9% | +0.6 pts |
| SimpleQA VerifiedEpoch AI, max effort. | 41.0% | 41.4% | +0.4 pts |
A score from one source is never compared with another source's, and company-reported scores are compared only within the same company; settings named where they differ. Data: Arena (arena.ai), CC BY 4.0; Epoch AI, Capabilities & benchmarking (epoch.ai/benchmarks), CC BY.
Features and parameters
Compare modelsSame on both
- Structured outputs: supported on both.gpt-5.6-luna: in place when tracking began (October 7, 2026) · source · gpt-6-luna: in place when tracking began (October 7, 2026) · source
- Function calling: supported on both.gpt-5.6-luna: in place when tracking began (October 7, 2026) · source · gpt-6-luna: in place when tracking began (October 7, 2026) · source
- Prompt caching: supported on both.gpt-5.6-luna: in place when tracking began (October 7, 2026) · source · gpt-6-luna: in place when tracking began (October 7, 2026) · source
- Batch API: supported on both.gpt-5.6-luna: in place when tracking began (October 7, 2026) · source · gpt-6-luna: in place when tracking began (October 7, 2026) · source
- Image input: supported on both.gpt-5.6-luna: in place when tracking began (October 7, 2026) · source · gpt-6-luna: in place when tracking began (October 7, 2026) · source
- Reasoning / thinking: supported on both.gpt-5.6-luna: in place when tracking began (October 7, 2026) · source · gpt-6-luna: in place when tracking began (October 7, 2026) · source
- Fine-tuning: not supported on both.gpt-5.6-luna: in place when tracking began (October 7, 2026) · source · gpt-6-luna: in place when tracking began (October 7, 2026) · source
- Built-in web search: supported on both.gpt-5.6-luna: in place when tracking began (October 7, 2026) · source · gpt-6-luna: in place when tracking began (October 7, 2026) · source
Not published for gpt-5.6-luna: PDF input, temperature parameter, top_p parameter, logprobs.
Not published for gpt-6-luna: PDF input, temperature parameter, top_p parameter, logprobs.
Free tier
gpt-5.6-luna: Free for shared data, 10M tokens a day for Launch and Grow (2.5M for Build), in place when tracking began (October 12, 2026) (source)
gpt-6-luna: Free for shared data, 1M tokens a day for Launch and Grow (250K for Build), in place when tracking began (October 12, 2026) (source) · All free models
Aliases
All aliasesNo aliases point at either model.
On cloud platforms
All platform dates| Model | Platform | Platform ID | Shutdown | Time left |
|---|---|---|---|---|
| gpt-5.6-luna | Amazon Bedrock | openai.gpt-5.6-luna | not before Jul 13, 2027Active | |
| gpt-5.6-luna | Microsoft Foundryversion 2026-07-09 | gpt-5.6-luna | Jan 11, 2028Active | 453 days |
Read daily from each platform's own pages. The status above uses each company's own date. Time left counts to 00:00 UTC on the shutdown date, which is the evening before in ET.
Checklist
- Change the model string from
gpt-5.6-lunatogpt-6-luna.
Compared from AIWire's published data when this page loaded. Each fact links to the page it came from. Model pages: gpt-5.6-luna, gpt-6-luna.