GPT-6.1 Terra: Price, Context and How It Compares to Sol

OpenAI's GPT-6.1 Terra is the cheap, fast rung in its GPT-6 lineup: $1 per million input tokens and $5 per million output tokens on the standard API tier, with a 1,050,000-token context window listed on OpenRouter. It is half the price of GPT-6.1 Sol and a tenth of GPT-6 Astra's input price.

Quick summary

• Released October 26, 2026, with a Pro variant listed at identical prices.
• Standard tier: $1.00 input, $5.00 output, $0.05 cached input per 1M tokens.
• Batch tier: $0.50 input and $2.50 output. Fast tier: $2.00 input and $10.00 output.
• Press coverage says OpenAI calls it about three times faster than GPT-6 Astra; those claims are OpenAI's own and unverified by independent tests.

How much does GPT-6.1 Terra cost?

OpenAI's API pricing page, as reported by Aiholics, puts Terra in the flagship group next to gpt-6-astra, gpt-6.1-sol and gpt-6-luna. Cache writes cost $1.25 for the 30-minute option and $2.50 for the 12-hour option. Output prices keep a steady 5-to-1 ratio to input across the models and tiers the page shows.

What is GPT-6.1 Terra good at?

Japanese outlet ITmedia, summarising OpenAI's launch, says Terra improves visual reasoning on things like drawings, computer operation and writing, and is aimed at everyday work such as drafting proposals, reading technical drawings, filling in forms and video editing. It succeeds GPT-5.6 Terra, which launched in July at $2.50 input and $15 output, so the price per token has fallen sharply.

Aiholics notes the model supports tool calling, structured output and adjustable reasoning effort and verbosity. Treat the speed and quality claims as vendor numbers until independent benchmarks arrive; one tracker, BenchLeader, showed only two benchmark results for it as of November 1.

Where can you use it?

According to AIBriefs, Terra rolls out to Plus, Pro, Enterprise and Edu users in ChatGPT Work and Codex, and is in the API as gpt-6.1-terra. Free-tier access was not mentioned in the sources we read, so check the ChatGPT app for your plan. Developers in India pay in dollars, so budget around the $1 and $5 rates.

Is it cheaper than Gemini 4 and Claude?

Google's Gemini 4 Argon is listed at $2 per million input tokens today and $4 from December 1, per AlexWrites, so Terra undercuts it on input. Our explainer on Gemini 4 Carbon covers the rivals at the top end, and the DeepSeek Super-Agent piece covers the open-source side. Price is not quality, so test on your own workload.

Verdict

If your app burns lots of tokens on routine agent work, Terra's $1/$5 pricing with a 95% cached-input discount is the number to watch. For hard reasoning tasks the pricier Sol and Astra remain the safer bet until independent results land.

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