GPT-5.6 Terra
gpt-5.6-terra
These are Mengbi Router customer prices in USD per 1M tokens. Provider: OpenAI; Context: 1M; Input price: $0.489; Output price: $2.93.
- Low latency
- Cost effective
AI models and pricing
Model specs
- Provider
- OpenAI
- Context
- 1M
- Max output
- 128K
- Released
- Jul 2026
- Input modalities
- Text, Image, PDF
- Output modalities
- Text
- Tool calling
- Supported
- Structured output
- Supported
- Currency
- USD
- Model ID
- gpt-5.6-terra
Model pricing and access details
USD / 1M tokens| Model | Official | Mengbi | Discount |
|---|---|---|---|
| Input price | $2 | $0.489 | 75% OFF |
| Output price | $12 | $2.93 | 75% OFF |
| Cache read price | $0.20 | $0.0489 | 75% OFF |
Estimated cost for common usage
Estimates based on current Mengbi Router prices, so you can plan real request costs.
| Token volume | Input | Output | Input + output total |
|---|---|---|---|
| 10K tokens | $0.00489 | $0.0293 | $0.0342 |
| 100K tokens | $0.0489 | $0.293 | $0.342 |
| 1M tokens | $0.489 | $2.93 | $3.42 |
| 10M tokens | $4.89 | $29.31 | $34.2 |
Estimates use the current prices above and exclude cache-hit discounts. Your invoice is metered by the actual token usage of each request.
Public benchmark scores
How GPT-5.6 Terra scores on common public benchmarks, so you can compare capability at a glance.
| Benchmark | Score |
|---|---|
| GPQA Diamond | 91.3 |
| SWE-bench Verified | 73.9 |
| AIME 2026 | 92.2 |
Curated from vendor-published evaluations (snapshot 2026-09). For reference only; not independently tested by Mengbi.
API protocol compatibility
Keep your SDK. Change one line.
Use the protocol your stack already speaks.
const client = new OpenAI({
apiKey: process.env.MENGBI_ROUTER_KEY,
baseURL: process.env.MENGBI_ROUTER_BASE_URL,
})
const response = await client.chat.completions.create({
model: 'gpt-5.6-terra',
messages,
})Frequently asked questions
Common questions about the GPT-5.6 Terra API: pricing, capabilities, and integration.
How much does the GPT-5.6 Terra API cost?
Through Mengbi Router, GPT-5.6 Terra costs $0.489 per 1M input tokens and $2.93 per 1M output tokens. Cached input is billed at $0.0489 per 1M tokens.
What is the context window of GPT-5.6 Terra?
GPT-5.6 Terra supports a 1M-token context window. A single request can generate up to about 128K output tokens.
Does GPT-5.6 Terra support tool calling and structured output?
Yes. GPT-5.6 Terra supports the tools parameter in chat.completions for function calling. It also supports response_format with a JSON Schema for structured output.
What input and output formats does GPT-5.6 Terra support?
It accepts Text, Image, and PDF and returns Text.
How do I call GPT-5.6 Terra with the OpenAI SDK?
Keep your OpenAI SDK, point the base URL at Mengbi Router, use your Mengbi API key, and set model to gpt-5.6-terra in the request.
Which company provides GPT-5.6 Terra?
GPT-5.6 Terra is provided by OpenAI and available through Mengbi Router with one API key and pay-as-you-go billing. The model was first released in Jul 2026.