OpenAIGPT-5.6 Terra pricing
$2.00 per 1M input tokens and $12.00 per 1M output tokens. In real work that is 1.4¢ per chat answer and 3.2¢ to summarize a 20-page PDF.
Official price at OpenAI: $2.00 / $12.00 per 1M, cached $0.20 (source, verified Oct 18, 2026).
What GPT-5.6 Terra costs per task
Token counts estimated from a measured model of the same lab (GPT-6 Luna), rescaled by tokenizer. Reasoning tokens are billed as output.
| Task | Cost | Tokens used | Price rank | Basis |
|---|---|---|---|---|
| Answer a chat question | 1.4¢$14.24 / 1,000 | 45 in · 540 out · 639 reasoning | 290 of 336 | estimated |
| Reply to a customer email | 0.16¢$1.64 / 1,000 | 258 in · 94 out | 211 of 336 | estimated |
| Write a 1,500-word blog post | 2.8¢$28.44 / 1,000 | 59 in · 2,217 out · 143 reasoning | 265 of 336 | estimated |
| Write 10 product descriptions | 1.3¢$12.82 / 1,000 | 283 in · 987 out · 34 reasoning | 235 of 336 | estimated |
| Translate 1,000 words | 1.9¢$19.40 / 1,000 | 1,330 in · 1,328 out · 67 reasoning | 237 of 336 | estimated |
| Proofread one page (500 words) | 1.0¢$10.50 / 1,000 | 718 in · 664 out · 91 reasoning | 267 of 336 | estimated |
| Summarize a 20-page PDF | 3.2¢$32.37 / 1,000 | 12,987 in · 449 out · 84 reasoning | 267 of 336 | estimated |
| Extract data from an invoice | 0.75¢$7.49 / 1,000 | 373 in · 422 out · 140 reasoning | 263 of 336 | estimated |
| Analyze a 200-row spreadsheet | 4.3¢$43.09 / 1,000 | 4,779 in · 456 out · 2,338 reasoning | 231 of 336 | estimated |
| Answer from 5 retrieved documents (RAG) | 1.1¢$11.44 / 1,000 | 3,690 in · 234 out · 104 reasoning | 248 of 336 | estimated |
| Classify 100 support tickets | 1.5¢$14.94 / 1,000 | 1,261 in · 445 out · 590 reasoning | 231 of 336 | estimated |
| Review 500 lines of code | 7.2¢$72.21 / 1,000 | 4,557 in · 337 out · 4,921 reasoning | 274 of 336 | estimated |
| Write a SQL query | 0.96¢$9.64 / 1,000 | 126 in · 266 out · 516 reasoning | 274 of 336 | estimated |
| Run a 50-step coding agent | 86¢$858 / 1,000 | 2,237,500 in · 15,000 out · 7,000 reasoning | 226 of 336 | modeled |
Price at every provider
List prices per 1M tokens (input / output) at each host serving GPT-5.6 Terra through OpenRouter today. Hosts can differ in quantization, context and speed.
| Provider | Input / output | Cached input | Context | Uptime |
|---|---|---|---|---|
OpenAIunknown | $1.00 / $6.00 | $0.10 | 1.05M | 100% |
 Azureunknown | $2.00 / $12.00 | $0.20 | 1.05M | 100% |
OpenAIunknown | $2.00 / $12.00 | $0.20 | 1.05M | 100% |
Azureunknown | $2.20 / $13.20 | $0.22 | 1.05M | |
 Amazon Bedrockunknown | $2.20 / $13.20 | $0.22 | 1.05M | |
Azureunknown | $2.20 / $13.20 | $0.22 | 1.05M | |
OpenAIunknown | $4.00 / $24.00 | $0.40 | 1.05M | 100% |
Price history
First seen in our price history on Jul 17, 2026 at $2.50 input / $15.00 output. Since then the output price moved from $15.00 to $12.00 per 1M tokens (3 changes).
FAQ
How much does GPT-5.6 Terra cost?
GPT-5.6 Terra costs $2.00 per 1 million input tokens and $12.00 per 1 million output tokens, with cached input at $0.20 (list price on Oct 18, 2026). In practice one chat answer costs about 1.4¢ and summarizing a 20-page PDF about 3.2¢.
Where is GPT-5.6 Terra cheapest?
Among 7 providers we track, the lowest list price today is at OpenAI: $1.00 input and $6.00 output per 1M tokens.
Does GPT-5.6 Terra charge for reasoning tokens?
Yes. Reasoning (thinking) tokens are billed as output tokens. That is why the cost per task can be much higher than the visible answer suggests - our task costs include them.
Is the GPT-5.6 Terra cost per task measured or estimated?
Estimated: GPT-5.6 Terra was not run directly. Tokens come from GPT-6 Luna and are rescaled by the tokenizer of OpenAI. Real usage can differ.