Which is cheaper, GPT-5.6 Terra or o1-pro?
As of August 20, 2026, GPT-5.6 Terra is 98% cheaper on blended LLM API pricing. GPT-5.6 Terra costs $2.00 per million input tokens and $12.00 per million output tokens ($14.00 blended 1M-in + 1M-out). o1-pro costs $150.00 / $600.00 per million tokens ($750.00 blended). Sources: https://developers.openai.com/api/docs/pricing and https://developers.openai.com/api/docs/pricing. The cheapest LLM for your app still depends on how many output tokens you generate.
How much does GPT-5.6 Terra vs o1-pro cost per million tokens?
GPT-5.6 Terra OpenAI API pricing is $2.00 input and $12.00 output per million tokens via OpenAI. o1-pro OpenAI API pricing is $150.00 input and $600.00 output per million tokens via OpenAI. Use those four numbers, not ChatGPT Plus or Claude Pro subscription prices, when you are comparing APIs.
Which is better for coding, GPT-5.6 Terra or o1-pro?
GPT-5.6 Terra has a published SWE-bench Verified score of 75.2%. o1-pro does not have that eval on this page yet.
What is the context window for GPT-5.6 Terra vs o1-pro?
GPT-5.6 Terra supports a 1M token context window, while o1-pro supports 200K tokens. GPT-5.6 Terra offers a larger context window. Filling a larger window bills more input tokens, so the cheaper-per-million model can still cost more on long documents.
Which model performs better on benchmarks, GPT-5.6 Terra or o1-pro?
GPT-5.6 Terra leads on 2 of 2 shared benchmarks versus o1-pro's 0 wins. Check the comparison table for GPQA Diamond, SWE-bench, MMLU, HLE, and the other evals we track. Token price and benchmark score together are the usual LLM comparison, not either number alone.
Is GPT-5.6 Terra or o1-pro better for production use?
Both GPT-5.6 Terra and o1-pro are production API models. For cost-sensitive production traffic, GPT-5.6 Terra has better economics on the blended 1M-in + 1M-out scale. For maximum capability, weight the benchmark table for your domain. Many production stacks route cheap models for drafts and a frontier model for the hard turn, which is usually cheaper than sending everything to the expensive API.
Can I switch between GPT-5.6 Terra and o1-pro in my app?
Yes. Call GPT-5.6 Terra through OpenAI and o1-pro through OpenAI with separate API keys, or through a gateway that already wraps both. Keep prompts in tokens, not characters, when you estimate the invoice. AnotherWrapper templates can swap providers without rewriting auth and billing.
How accurate is this GPT-5.6 Terra vs o1-pro pricing data?
List rates are the latest published OpenAI API pricing and OpenAI API pricing, quoted per million tokens. Official rate sheets: https://developers.openai.com/api/docs/pricing and https://developers.openai.com/api/docs/pricing. Prompt caching, batch APIs, and committed-use discounts can change the invoice. Benchmark scores are from official publications and independent evals, updated as new numbers land.
What is the output token limit for GPT-5.6 Terra and o1-pro?
GPT-5.6 Terra supports up to 128K output tokens per request, while o1-pro supports up to 100K output tokens. Output tokens are usually the expensive half of API pricing, so a higher max output cap is a capability, not a discount.
Which model has better throughput, GPT-5.6 Terra or o1-pro?
GPT-5.6 Terra has a measured throughput of approximately 34.88545641142904 tokens/second. Throughput data for o1-pro is not yet available. Throughput (tokens per second) and time-to-first-token are why two models with the same per-million-token price can still feel different in chat and agents.
How do I switch the models in this GPT-5.6 Terra vs o1-pro comparison?
Use the model pickers at the top of this LLM comparison. Search any model in the index and the URL updates. Open GPT-5.6 Terra or o1-pro from the sidebar for the single-model API pricing page, or go back to the LLM pricing table to sort by cheapest blended cost.
