OpenAI: GPT-5.6 Luna Pro

openai/gpt-5.6-luna-pro

GPT-5.6 Luna Pro is a OpenAI model that isn't ranked on the TryAii Score yet — no benchmark results on file. It lists at $0.2/$1.2 per million input/output tokens with a 1.05M-token context. It's among the fastest models we track, at roughly 202-214 tokens/sec.

Prompt $/1M

$0.200

Completion $/1M

$1.200

Context

1,050,000 tok

Best provider

221 tok/s · Azure

Specs

Model id: openai/gpt-5.6-luna-pro
Display name: OpenAI: GPT-5.6 Luna Pro
Modality: text+image+file->text
Tokenizer: GPT
Instruct type: —
Context length: 1,050,000
Max completion: 128,000
Prompt $/1M: $0.200
Completion $/1M: $1.200
Free tier: no

Capabilities

Function callingno
JSON modeno
System promptno
Visionno
Moderatedyes

Benchmark scores

Each axis is one benchmark, normalized to the best model in the field.

No benchmark data for this model.

Speed by provider

Provider	tok/s	TTFT	Total latency
Azurefastest	221	31,537 ms	34,405 ms
OpenAI	195	6,382 ms	7,212 ms
openaifastest	—	—	—

Prompt caching by provider

Provider	Min tokens to cache	Notes
OpenAI	1,024 tokens	GPT-5.6 family — first OpenAI generation with a cache-write premium (1.25x input on cold writes; single-use large prompts pay it for nothing). Docs cite prefixes staying reusable at least 30 min.