GPT-6.1 Sol vs DeepSeek V4 Pro: API cost comparison
For a typical chatbot (1,500 input + 400 output tokens, 100,000 requests a month), DeepSeek V4 Pro is 48% cheaper: $366 vs $700 for GPT-6.1 Sol. Paste your own prompt below to compare the exact cost of your workload.
0 characters0 words0 tokens (GPT o200k)
| Model | Per month |
|---|---|
| GPT-6.1 Sol | |
| DeepSeek V4 Pro |
≈ = estimated token count: only OpenAI publishes its tokenizer. Claude counts use Anthropic’s published ratios; use the count_tokens API for an exact number.
Price per million tokens
USD, standard tier. Prices checked on October 28, 2026.
| GPT-6.1 Sol | DeepSeek V4 Pro | |
|---|---|---|
| Input | $2 | $1.32 |
| Output | $10 | $3.96 |
| Cached input | $0.1 | $0.044 |
| Cache write (5 min) | Not charged separately | Not charged separately |
| Long prompts | Above 272K tokens: $4 / $15 | Same price at any length |
| Batch API | 50% off | No discount |
| Provider | OpenAI (GPT) | DeepSeek |
DeepSeek V4 Pro: Peak price. Off-peak is half: outside 01–04 and 06–10 UTC on weekdays, plus weekends and Chinese public holidays.
Monthly cost for common workloads
| Workload | GPT-6.1 Sol | DeepSeek V4 Pro |
|---|---|---|
| Chatbot 1,500 input + 400 output tokens, 100,000 requests a month | $700 | $366 |
| Document Q&A (RAG) 8,000 input + 500 output tokens, half the input cached, 20,000 requests a month | $268 | $154 |
| Long-document summary 150,000 input + 2,000 output tokens, 1,000 requests a month | $320 | $216 |
| Bulk classification (Batch API) 500 input + 20 output tokens, 1 million requests a month, Batch API where available | $600 | $772 |
Token counts are converted per model: the same text becomes a different number of tokens on each provider (see below). The cheaper option in each row is highlighted.
Frequently asked questions
Is GPT-6.1 Sol cheaper than DeepSeek V4 Pro?
Per million tokens, GPT-6.1 Sol costs $2 / $10 (input / output) and DeepSeek V4 Pro costs $1.32 / $3.96. For a typical chatbot workload (1,500 input + 400 output tokens, 100,000 requests a month), DeepSeek V4 Pro is 48% cheaper: $366 vs $700 for GPT-6.1 Sol. Token counts differ between providers, so compare the cost of the same prompt rather than the price per token.
How much do GPT-6.1 Sol and DeepSeek V4 Pro cost per million tokens?
GPT-6.1 Sol: $2 / $10 for input / output, $0.1 for cached input. DeepSeek V4 Pro: $1.32 / $3.96, $0.044 for cached input. Prices in US dollars, standard tier, checked on October 28, 2026.
Do GPT-6.1 Sol and DeepSeek V4 Pro count tokens the same way?
GPT-6.1 Sol's tokenizer is not published; we use the o200k count, which is close for newer OpenAI models. DeepSeek V4 Pro's tokenizer is not published. We estimate about 1.05× the GPT o200k count for the same text.
Do GPT-6.1 Sol and DeepSeek V4 Pro have a Batch API discount?
Only GPT-6.1 Sol does (50% off). DeepSeek V4 Pro has no batch discount.
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