Terminal-Bench 4.0
codex0.149.1
Reasoning effort max
Tested model identity
GPT-5.6 Terraopenai/gpt-5.6-terraPass rate21.52%
95% CI 18.27%–24.77%
n = 330Checked
openaiListed Jul 9, 2026
OpenAI: GPT-5.6 Terra
GPT-5.6 Terra is a balanced model in OpenAI's GPT-5.6 series, positioned between the flagship Sol tier and the cost-efficient Luna tier. It is suited for everyday coding, reasoning, and agentic...
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
- $2.00
- Output
- $12.00
- Cached input
- $0.20
Experiential
Standard · fewer than 272,001 input tokens
- Input
- $2.00
- Output
- $12.00
- Cached input
- $0.20
Catalog list rate. Plan allowances and temporary discounts are separate.
Experiential
At least 272,001 input tokens
- Input
- $4.00
- Output
- $18.00
- Cached input
- $0.40
Catalog list rate. Plan allowances and temporary discounts are separate.
- Input
- $1.00
- Output
- $6.00
- Cached input
- $0.10
Max prompt 922000 tokens · Cache write $1.25/M tokens · Web search $0.01/search
OpenAI
via OpenRouteropenai/flex · tier=flex · prompt over 272000 tokens · rate option 1
Conditional rate- Input
- $2.00
- Output
- $9.00
- Cached input
- $0.20
Max prompt 922000 tokens · Cache write $2.5/M tokens · Web search $0.01/search · A rate applies when all its listed conditions match. Dates and times use UTC.
- Input
- $2.00
- Output
- $12.00
- Cached input
- $0.20
Max prompt 922000 tokens · Cache write $2.5/M tokens · Web search $0.01/search
- Input
- $4.00
- Output
- $18.00
- Cached input
- $0.40
Max prompt 922000 tokens · Cache write $5/M tokens · Web search $0.01/search · A rate applies when all its listed conditions match. Dates and times use UTC.
- Input
- $2.00
- Output
- $12.00
- Cached input
- $0.20
Max prompt 922000 tokens · Cache write $2.5/M tokens · Web search $0.01/search
- Input
- $4.00
- Output
- $18.00
- Cached input
- $0.40
Max prompt 922000 tokens · Cache write $5/M tokens · Web search $0.01/search · A rate applies when all its listed conditions match. Dates and times use UTC.
- Input
- $2.20
- Output
- $13.20
- Cached input
- $0.22
Cache write $2.75/M tokens · Web search $0.01/search
- Input
- $4.40
- Output
- $19.80
- Cached input
- $0.44
Cache write $5.5/M tokens · Web search $0.01/search · A rate applies when all its listed conditions match. Dates and times use UTC.
- Input
- $2.20
- Output
- $13.20
- Cached input
- $0.22
Max prompt 922000 tokens · Cache write $2.75/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
- $4.40
- Output
- $19.80
- Cached input
- $0.44
Max prompt 922000 tokens · Cache write $5.5/M tokens · Web search $0.01/search · A rate applies when all its listed conditions match. Dates and times use UTC.
- Input
- $2.20
- Output
- $13.20
- Cached input
- $0.22
Cache write $2.75/M tokens · Web search $0.01/search
- Input
- $4.40
- Output
- $19.80
- Cached input
- $0.44
Cache write $5.5/M tokens · Web search $0.01/search · A rate applies when all its listed conditions match. Dates and times use UTC.
- Input
- $4.00
- Output
- $24.00
- Cached input
- $0.40
Max prompt 922000 tokens · Cache write $5/M tokens · Web search $0.01/search
OpenAI
via OpenRouteropenai/fast · tier=priority · prompt over 272000 tokens · rate option 1
Conditional rate- Input
- $8.00
- Output
- $36.00
- Cached input
- $0.80
Max prompt 922000 tokens · Cache write $10/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-terra - experiential
gpt-5.6-terra
Sources
Updated Oct 18, 2026
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