Which is cheaper, DeepSeek-V4-Pro-0813 or GPT OSS 120B?
As of August 20, 2026, GPT OSS 120B is 90% cheaper on blended LLM API pricing. GPT OSS 120B costs $0.09 per million input tokens and $0.45 per million output tokens ($0.54 blended 1M-in + 1M-out). DeepSeek-V4-Pro-0813 costs $1.32 / $3.96 per million tokens ($5.28 blended). Sources: https://api-docs.deepseek.com/quick_start/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 DeepSeek-V4-Pro-0813 vs GPT OSS 120B cost per million tokens?
DeepSeek-V4-Pro-0813 DeepSeek API pricing is $1.32 input and $3.96 output per million tokens via DeepSeek. GPT OSS 120B OpenAI API pricing is $0.09 input and $0.45 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, DeepSeek-V4-Pro-0813 or GPT OSS 120B?
DeepSeek-V4-Pro-0813 leads on SWE-bench Verified: DeepSeek-V4-Pro-0813 at 96.4% vs GPT OSS 120B at 33.6%. SWE-bench measures real GitHub fixes; LiveCodeBench measures contest programming.
What is the context window for DeepSeek-V4-Pro-0813 vs GPT OSS 120B?
DeepSeek-V4-Pro-0813 supports a 1M token context window, while GPT OSS 120B supports 131K tokens. DeepSeek-V4-Pro-0813 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, DeepSeek-V4-Pro-0813 or GPT OSS 120B?
DeepSeek-V4-Pro-0813 leads on 9 of 9 shared benchmarks versus GPT OSS 120B'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 DeepSeek-V4-Pro-0813 or GPT OSS 120B better for production use?
Both DeepSeek-V4-Pro-0813 and GPT OSS 120B are production API models. For cost-sensitive production traffic, GPT OSS 120B 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 DeepSeek-V4-Pro-0813 and GPT OSS 120B in my app?
Yes. Call DeepSeek-V4-Pro-0813 through DeepSeek and GPT OSS 120B 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 DeepSeek-V4-Pro-0813 vs GPT OSS 120B pricing data?
List rates are the latest published DeepSeek API pricing and OpenAI API pricing, quoted per million tokens. Official rate sheets: https://api-docs.deepseek.com/quick_start/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 DeepSeek-V4-Pro-0813 and GPT OSS 120B?
DeepSeek-V4-Pro-0813 supports up to 393K output tokens per request, while GPT OSS 120B supports up to 131K 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, DeepSeek-V4-Pro-0813 or GPT OSS 120B?
DeepSeek-V4-Pro-0813 has a measured throughput of approximately 32.92418680531271 tokens/second. Throughput data for GPT OSS 120B 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 DeepSeek-V4-Pro-0813 vs GPT OSS 120B comparison?
Use the model pickers at the top of this LLM comparison. Search any model in the index and the URL updates. Open DeepSeek-V4-Pro-0813 or GPT OSS 120B from the sidebar for the single-model API pricing page, or go back to the LLM pricing table to sort by cheapest blended cost.
