GPT-5.6 Terra vs GPT-5.6 Terra Pro
Pick up to 3 models · pricing, context and capabilities · simulate your product cost
Data updated on September 30, 2026· 217 models
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.
- Reasoning estimated
- Speed estimated
- ▲
- Input
- Output
- Context
- 1.1 M tokens
- Max output
- 128 K
- Input, $ per 1M tokens
- $2.00
- Output, $ per 1M tokens
- $12.00
- Cache read, $ per 1M
- $0.200
- Batch (input / output)
- $1.00 / $6.00
- Tool calling
- Yes
- Released
- 07/09/2026
- Knowledge cutoff
- 2026-02-16
- API id
- openai/gpt-5.6-terra
GPT-5.6 Terra Pro is the same underlying model as GPT-5.6 Terra, served with reasoning.mode set to pro for higher-quality responses on complex tasks.
- Reasoning estimated
- ▲
- Speed estimated
- Input
- Output
- Context
- 1.1 M tokens
- Max output
- 128 K
- Input, $ per 1M tokens
- $2.00
- Output, $ per 1M tokens
- $12.00
- Cache read, $ per 1M
- $0.200
- Batch (input / output)
- $1.00 / $6.00
- Tool calling
- Yes
- Released
- 07/09/2026
- Knowledge cutoff
- 2026-02-16
- API id
- openai/gpt-5.6-terra-pro
Which is the better API choice: GPT-5.6 Terra vs GPT-5.6 Terra Pro?
- GPT-5.6 Terra Pro: most reasoning (estimated)
- GPT-5.6 Terra: the fastest (estimated)
GPT-5.6 Terra and GPT-5.6 Terra Pro cost the same ($2.00 input, $12.00 output per million tokens). All accept 1.1 M tokens of context. GPT-5.6 Terra and GPT-5.6 Terra Pro offer a batch tier at half price for jobs that do not need an immediate answer.
What would your product cost?
Estimate the monthly cost with your app's real volume. List prices, no cache or batch discounts.
They cost the same at this volume.
The 6 cheapest for this scenario (chat, last 12 months)
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- 2Lyria 3 Clip Preview Google$0.00
- 3Qwen3.7 Flash Qwen$0.97
- 4DeepSeek V4 Flash 0731 DeepSeek$1.55
- 5Ministral 3 3B 2512 Mistral$1.90
- 6Qwen3.5-Flash Qwen$2.02
Paste your prompt: tokens and cost per model
Rough estimate (about 4 characters per token). Nothing is sent to any server.
Cost of sending it 1,000 times (input only)
- 1GPT-5.6 Terra OpenAI$0.152
- 2GPT-5.6 Terra Pro OpenAI$0.152
- 3Claude Sonnet 5.5 Anthropic$0.152
- 4Claude Sonnet 5 Anthropic$0.152
- 5Claude Opus 5.5 Anthropic$0.304
- 6Claude Opus 5 Anthropic$0.380
- 7Claude Fable 5.1 Anthropic$0.760
- 8Claude Fable 5 Anthropic$0.760
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Frequently asked questions
Which is the better API choice: GPT-5.6 Terra vs GPT-5.6 Terra Pro?
GPT-5.6 Terra and GPT-5.6 Terra Pro cost the same ($2.00 input, $12.00 output per million tokens). All accept 1.1 M tokens of context. GPT-5.6 Terra and GPT-5.6 Terra Pro offer a batch tier at half price for jobs that do not need an immediate answer.
Which is cheaper: GPT-5.6 Terra and GPT-5.6 Terra Pro?
GPT-5.6 Terra and GPT-5.6 Terra Pro cost the same: $2.00 per million input tokens and $12.00 output.
Which has more context: GPT-5.6 Terra and GPT-5.6 Terra Pro?
GPT-5.6 Terra and GPT-5.6 Terra Pro accept the same context: 1.1 M tokens.
What would 10,000 requests a month cost with GPT-5.6 Terra and GPT-5.6 Terra Pro?
With 1,500 input and 400 output tokens per request: GPT-5.6 Terra: $78.00; GPT-5.6 Terra Pro: $78.00 a month, at list price.
Where do the prices come from and how often are they updated?
From the public catalogs of OpenRouter, models.dev and LiteLLM, which publish each provider's list prices. They sync once a day and the last update date is shown above the comparison.
What does price per million tokens mean?
It is what the provider charges per million tokens you send (input) or the model generates (output). A token is roughly 4 characters. Output almost always costs more than input.
Sources: OpenRouter, models.dev and LiteLLM. Prices in USD per million tokens, list price, no volume discounts. Prompt tokens are an estimate; each provider's tokenizer may differ.