GPT-6.1 Terra vs GPT-6 Astra Pro
Pick up to 3 models · pricing, context and capabilities · simulate your product cost
Data updated on November 14, 2026· 230 models
GPT-6.1 Terra is the mid-tier model in OpenAI's GPT-6.1 series, priced below GPT-6.1 Sol.
- Reasoning estimated
- Speed estimated
- ▲
- Input
- Output
- Context
- 1.1 M tokens
- Max output
- 128 K
- Input, $ per 1M tokens
- ▲$1.00
- Output, $ per 1M tokens
- ▲$5.00
- Cache read, $ per 1M
- $0.050
- Batch (input / output)
- $0.500 / $2.50
- Tool calling
- Yes
- Released
- ▲10/26/2026
- Knowledge cutoff
- 2026-06-01
- API id
- openai/gpt-6.1-terra
GPT-6 Astra Pro is the same underlying model as GPT-6 Astra, 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
- $10.00
- Output, $ per 1M tokens
- $50.00
- Cache read, $ per 1M
- $1.000
- Batch (input / output)
- $5.00 / $25.00
- Tool calling
- Yes
- Released
- 09/04/2026
- Knowledge cutoff
- —
- API id
- openai/gpt-6-astra-pro
Which is the better API choice: GPT-6.1 Terra vs GPT-6 Astra Pro?
- GPT-6.1 Terra: cheapest input (90% less than GPT-6 Astra Pro)
- GPT-6.1 Terra: cheapest output
- GPT-6.1 Terra: the newest (10/26/2026)
- GPT-6 Astra Pro: most reasoning (estimated)
- GPT-6.1 Terra: the fastest (estimated)
GPT-6.1 Terra costs 90% less on input and 90% less on output than GPT-6 Astra Pro ($1.00 / $5.00 versus $10.00 / $50.00 per million tokens). All accept 1.1 M tokens of context. GPT-6.1 Terra and GPT-6 Astra 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.
With GPT-6.1 Terra you save $315.00 a month versus GPT-6 Astra Pro (90% less).
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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)
- 1Claude Haiku 5.5 Anthropic$0.008
- 2GPT-6.1 Terra OpenAI$0.076
- 3Claude Sonnet 5.5 Anthropic$0.152
- 4Claude Opus 5.5 Anthropic$0.304
- 5Claude Opus 5 Anthropic$0.380
- 6Claude Fable 5.2 Anthropic$0.608
- 7GPT-6 Astra Pro OpenAI$0.760
- 8Claude Fable 5.1 Anthropic$0.760
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See allFrequently asked questions
Which is the better API choice: GPT-6.1 Terra vs GPT-6 Astra Pro?
GPT-6.1 Terra costs 90% less on input and 90% less on output than GPT-6 Astra Pro ($1.00 / $5.00 versus $10.00 / $50.00 per million tokens). All accept 1.1 M tokens of context. GPT-6.1 Terra and GPT-6 Astra Pro offer a batch tier at half price for jobs that do not need an immediate answer.
Which is cheaper: GPT-6.1 Terra and GPT-6 Astra Pro?
GPT-6.1 Terra is cheaper: $1.00 per million input tokens and $5.00 per million output tokens, versus $10.00 / $50.00 for GPT-6 Astra Pro.
Which has more context: GPT-6.1 Terra and GPT-6 Astra Pro?
GPT-6.1 Terra and GPT-6 Astra Pro accept the same context: 1.1 M tokens.
Which is newer: GPT-6.1 Terra and GPT-6 Astra Pro?
GPT-6.1 Terra was released on 10/26/2026; GPT-6 Astra Pro on 09/04/2026.
What would 10,000 requests a month cost with GPT-6.1 Terra and GPT-6 Astra Pro?
With 1,500 input and 400 output tokens per request: GPT-6.1 Terra: $35.00; GPT-6 Astra Pro: $350.00 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.