THE TICKER · HEAD-TO-HEAD · CHECKED DAILY · LAST CHANGE 2026-08-14
GPT-5.6 TERRA VS GEMINI 3.1 PRO
OpenAI vs Google, in USD per million tokens, cross-checked daily against the public pricing dataset. Same jobs, both meters running.
Effectively a tie: for the same job (a 1,000-token prompt with a 3,000-token reply), GPT-5.6 Terra and Gemini 3.1 Pro bill within 5% of each other. Pick on quality, latency or taste — price won't settle this one.
SIDE BY SIDE
| GPT-5.6 Terra → | Gemini 3.1 Pro → | |
|---|---|---|
| Vendor | OpenAI | |
| Input / MTok | $2.00 | $2.00 |
| Output / MTok | $12.00 | $12.00 |
| Output multiple | 6.0x | 6.0x |
| 1K prompt + 3K reply | $0.04 | $0.04 |
SAME JOB, BOTH BILLS
| Scenario | GPT-5.6 Terra | Gemini 3.1 Pro | Gap |
|---|---|---|---|
| A typical prompt | $0.01 | $0.01 | — |
| A 20-turn conversation | $0.06 | $0.06 | — |
| Summarizing a 10-page document | $0.05 | $0.05 | — |
| One agent run | $0.15 | $0.15 | — |
| A code review request | $0.05 | $0.05 | — |
Output sizes use the same editorial ratios as the Burn Calculator. Estimates, not invoices — and price is not a benchmark: the cheaper model is only a bargain if it does the job.
SETTLE IT WITH YOUR OWN PROMPT
Paste a real prompt into the Burn Calculator and see what it costs on GPT-5.6 Terra, Gemini 3.1 Pro and the other 18 models on the board — plus how much of it is waste either way.