OpenAI

GPT-6.1 Terra

A fast, efficient model for visual reasoning, precise computer use, and clear, natural writing.

ActiveKnowledge cutoff June 1, 2026
Tool callingCan invoke external tools and APIs (function calling) mid-response.Structured outputCan return JSON or schema-constrained responses instead of free text.ReasoningUses extended thinking / chain-of-thought for harder multi-step problems.Effort controlLets you dial thinking depth (low / medium / high) to trade cost for quality.Fine-tuningSupports training a custom variant on your own data (vendor fine-tune API or self-hosted open weights).

Source: https://developers.openai.com/api/docs/models/gpt-6.1-terra, https://developers.openai.com/api/docs/changelog, https://openai.com/index/introducing-gpt-6-1-terra/

Price per 1M tokens
$1 in / $5 out
Context window1,050,000
Max output128,000
Cache read$0.05 / M
Batch discount-50%
Input
  • Text
  • Image
Output
  • Text

Pricing

Every billing leg from the live catalog, in USD per 1M tokens.

Billing legStandardLong contextBatch
Input$1 / M$2 / M$0.5 / M
Output$5 / M$7.5 / M$2.5 / M
Cache read$0.05 / M$0.1 / M$0.025 / M

Long-context rates apply above 272,000 input tokens.

Cost calculator

Billing-grade math over the rate card above, including the thinking tokens most estimates miss.

Hidden reasoning tokens bill as output. 1.0x = thinking off. Medium-effort reasoning typically lands near 3x; heavy reasoning runs 6x to 8x. Set it to match your workload.

Estimated monthly cost
$500
at current list prices
Fresh input$200
Cached input$0.00
Output incl. thinking$300
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Provider

Where this model runs, and what it charges.

PlatformInput / MOutput / MCache read / MBatchAccess
OpenAI
$1$5$0.05✓First-party API

Price history

Has this model gotten cheaper or more expensive?

No changePriced at $1 / $5 per 1M since October 27, 2026.

More from OpenAI

Other models from the same provider.

GPT-6.1 Sol
openai/gpt-6.1-sol
$2 / $10 in / out per 1M
GPT-6 Sol
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$2 / $10 in / out per 1M
GPT-6 Luna
openai/gpt-6-luna
$0.1 / $0.5 in / out per 1M
GPT-6 Astra
openai/gpt-6-astra
$10 / $50 in / out per 1M
GPT-5.6 Sol
openai/gpt-5.6-sol
$4 / $20 in / out per 1M
GPT-5.6 Terra
openai/gpt-5.6-terra
$2 / $12 in / out per 1M

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Rates are generated from SuperPenguin's live pricing catalog.