Terminal-Bench 4.0
codex0.149.1
Reasoning effort max
Tested model identity
GPT-5.6 Lunaopenai/gpt-5.6-lunaPass rate17.27%
95% CI 14.42%–20.12%
n = 330Checked
openaiListed Jul 9, 2026
OpenAI: GPT-5.6 Luna
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...
Context window1.1M
Max output128K
Provider endpoints9
Benchmark results0
Agent runs1
Measured performance
All leaderboards ↗Benchmark results
No published results in this index yet
Scores appear here when an evaluation matches this exact model.
Model + harness
All agent results ↗Agent runs
codex
Access & cost
17 quotesPrices across providers
Your token mix
USD · listed token ratesOpenRouter
Catalog quote- Input
- $0.20
- Output
- $1.20
- Cached input
- $0.02
Experiential
Standard · fewer than 272,001 input tokens
- Input
- $0.20
- Output
- $1.20
- Cached input
- $0.02
Catalog list rate. Plan allowances and temporary discounts are separate.
Experiential
At least 272,001 input tokens
- Input
- $0.40
- Output
- $1.80
- Cached input
- $0.04
Catalog list rate. Plan allowances and temporary discounts are separate.
- Input
- $0.10
- Output
- $0.60
- Cached input
- $0.01
Max prompt 922000 tokens · Cache write $0.125/M tokens · Web search $0.01/search
OpenAI
via OpenRouteropenai/flex · tier=flex · prompt over 272000 tokens · rate option 1
Conditional rate- Input
- $0.20
- Output
- $0.90
- Cached input
- $0.02
Max prompt 922000 tokens · Cache write $0.25/M tokens · Web search $0.01/search · A rate applies when all its listed conditions match. Dates and times use UTC.
- Input
- $0.20
- Output
- $1.20
- Cached input
- $0.02
Max prompt 922000 tokens · Cache write $0.25/M tokens · Web search $0.01/search
- Input
- $0.40
- Output
- $1.80
- Cached input
- $0.04
Max prompt 922000 tokens · Cache write $0.5/M tokens · Web search $0.01/search · A rate applies when all its listed conditions match. Dates and times use UTC.
- Input
- $0.20
- Output
- $1.20
- Cached input
- $0.02
Max prompt 922000 tokens · Cache write $0.25/M tokens · Web search $0.01/search
- Input
- $0.40
- Output
- $1.80
- Cached input
- $0.04
Max prompt 922000 tokens · Cache write $0.5/M tokens · Web search $0.01/search · A rate applies when all its listed conditions match. Dates and times use UTC.
- Input
- $0.22
- Output
- $1.32
- Cached input
- $0.022
Cache write $0.275/M tokens · Web search $0.01/search
- Input
- $0.44
- Output
- $1.98
- Cached input
- $0.044
Cache write $0.55/M tokens · Web search $0.01/search · A rate applies when all its listed conditions match. Dates and times use UTC.
- Input
- $0.22
- Output
- $1.32
- Cached input
- $0.022
Max prompt 922000 tokens · Cache write $0.275/M tokens · Web search $0.01/search
Amazon Bedrock
via OpenRouteramazon-bedrock/us-east-1 · prompt over 272000 tokens · rate option 1
Conditional rate- Input
- $0.44
- Output
- $1.98
- Cached input
- $0.044
Max prompt 922000 tokens · Cache write $0.55/M tokens · Web search $0.01/search · A rate applies when all its listed conditions match. Dates and times use UTC.
- Input
- $0.22
- Output
- $1.32
- Cached input
- $0.022
Cache write $0.275/M tokens · Web search $0.01/search
- Input
- $0.44
- Output
- $1.98
- Cached input
- $0.044
Cache write $0.55/M tokens · Web search $0.01/search · A rate applies when all its listed conditions match. Dates and times use UTC.
- Input
- $0.40
- Output
- $2.40
- Cached input
- $0.04
Max prompt 922000 tokens · Cache write $0.5/M tokens · Web search $0.01/search
OpenAI
via OpenRouteropenai/fast · tier=priority · prompt over 272000 tokens · rate option 1
Conditional rate- Input
- $0.80
- Output
- $3.60
- Cached input
- $0.08
Max prompt 922000 tokens · Cache write $1/M tokens · Web search $0.01/search · A rate applies when all its listed conditions match. Dates and times use UTC.
Model specifications
- Developer
- openai
- Modality
- Language
- Context
- 1,050,000 tokens
- Maximum output
- 128,000 tokens
- Weights
- Not reported
- Provider listed
- Jul 9, 2026
- First discovered
- Oct 16, 2026
Exact identities
- openrouter
openai/gpt-5.6-luna - experiential
gpt-5.6-luna
Sources
Updated Oct 20, 2026
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