THE TICKER · HEAD-TO-HEAD · CHECKED DAILY · LAST CHANGE 2026-09-06
GPT-5.6 VS DEEPSEEK V4 FLASH
OpenAI vs DeepSeek, in USD per million tokens, cross-checked daily against the public pricing dataset. Same jobs, both meters running.
GPT-5.6 costs 29.1x more than DeepSeek V4 Flash for the same job — a 1,000-token prompt with a 3,000-token reply runs $0.06 vs $0.0022. At 1,000 runs a day, that gap is $1,854.00 a month for identical traffic.
SIDE BY SIDE
| GPT-5.6 → | DeepSeek V4 Flash → | |
|---|---|---|
| Vendor | OpenAI | DeepSeek |
| Input / MTok | $4.00 | $0.220 |
| Output / MTok | $20.00 | $0.660 |
| Output multiple | 5.0x | 3.0x |
| 1K prompt + 3K reply | $0.06 | $0.0022 |
SAME JOB, BOTH BILLS
| Scenario | GPT-5.6 | DeepSeek V4 Flash | Gap |
|---|---|---|---|
| A typical prompt | $0.02 | $0.0007 | 29.1x |
| A 20-turn conversation | $0.10 | $0.0035 | 27.3x |
| Summarizing a 10-page document | $0.10 | $0.0039 | 24.8x |
| One agent run | $0.25 | $0.0084 | 29.7x |
| A code review request | $0.08 | $0.0028 | 28.9x |
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, DeepSeek V4 Flash and the other 23 models on the board — plus how much of it is waste either way.