DeepSeek V4 Flash vs GPT-OSS 20B (Groq): API Cost Comparison
Compare the API pricing, context windows, features, and real-world cost projections for DeepSeek V4 Flash (DeepSeek) and GPT-OSS 20B (Groq) (Groq). Use the interactive calculator below to compute your exact monthly cost based on your token usage and request volume.
Prices verified Apr 30, 2026
Interactive Cost Calculator
Fills in typical token counts for a workload type
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Showing costs for 2 models. Cheapest: GPT-OSS 20B (Groq) at $2.25/month.
| Alert | |||||||
|---|---|---|---|---|---|---|---|
BestGPT-OSS 20B (Groq) | Groq | $2.25 | $0.000225 | $0.75 | $1.50 | 19.6% | Alerts coming soon |
DeepSeek V4 Flash | DeepSeek | $2.80 | $0.000280 | $1.40 | $1.40 | — | Alerts coming soon |
Monthly Cost Comparison
Price Comparison at a Glance
All prices are in USD per 1 million tokens ($/M tokens). Lower is cheaper.
| Pricing Type | DeepSeek V4 Flash | GPT-OSS 20B (Groq) | Cheaper |
|---|---|---|---|
| Input (standard) | $0.14/M | $0.08/M | GPT-OSS 20B (Groq) |
| Output | $0.28/M | $0.30/M | DeepSeek V4 Flash |
| Cached input | N/A | $0.04/M | — |
Prices last verified: 2026-03-06 – 2026-04-30
Cost Breakdown by Usage Volume
Estimated monthly costs at different request volumes, assuming 1,000 input tokens and 500 output tokens per request. Adjust in the calculator above for your specific use case.
| Volume | DeepSeek V4 FlashMonthly | GPT-OSS 20B (Groq)Monthly | DeepSeek V4 FlashPer request | GPT-OSS 20B (Groq)Per request |
|---|---|---|---|---|
| 1K requests/mo | $0.28 | $0.22 | $0.000280 | $0.000225 |
| 10K requests/mo | $2.80 | $2.25 | $0.000280 | $0.000225 |
| 100K requests/mo | $28.00 | $22.50 | $0.000280 | $0.000225 |
| 1M requests/mo | $280.00 | $225.00 | $0.000280 | $0.000225 |
Green values indicate the lower-cost option at each volume tier. Cost per request is calculated at 1,000 input + 500 output tokens using standard (non-batch, non-cached) pricing.
Price History
Input price per 1M tokensWhen to Choose DeepSeek V4 Flash
by DeepSeek
- General chatbot
Input / 1M tokens
$0.14/M
Output / 1M tokens
$0.28/M
Context window
1,048,576
Tier
budget
When to Choose GPT-OSS 20B (Groq)
by Groq
- Customer support
- Text classification
- General chatbot
Input / 1M tokens
$0.08/M
Output / 1M tokens
$0.30/M
Context window
131,072
Tier
budget
Key Differences Beyond Price
Cost is only one factor in choosing an AI model. Context window size, rate limits, supported features, and latency all affect whether a model fits your use case.
| Capability | DeepSeek V4 Flash | GPT-OSS 20B (Groq) |
|---|---|---|
| Context window | 1,048,576 tokens | 131,072 tokens |
| Max output tokens | 384,000 tokens | 32,768 tokens |
| Performance tier | Budget | Budget |
| Vision / image input | No | No |
| Function calling | Yes | Yes |
| JSON mode | Yes | Yes |
| Prompt caching | No | Yes |
| Batch API (50% discount) | No | No |
| Extended reasoning | Yes | No |
| Fine-tuning | No | No |
| Rate limit (req/min) | Not published | 30 |
GPT-OSS 20B (Groq) notes
OpenAI's open-weight MoE model on Groq hardware. Prompt caching available at 50% discount.
Frequently Asked Questions
Is DeepSeek V4 Flash cheaper than GPT-OSS 20B (Groq)?
At standard usage (1,000 input tokens, 500 output tokens, 100,000 requests/month), GPT-OSS 20B (Groq) costs $22.50/month versus $28.00/month for DeepSeek V4 Flash — a 20% saving. Your actual savings will vary based on your token profile; output-heavy workloads amplify differences in output pricing.
Which model has a larger context window, DeepSeek V4 Flash or GPT-OSS 20B (Groq)?
DeepSeek V4 Flash has a larger context window at 1,048,576 tokens, compared to 131,072 tokens for GPT-OSS 20B (Groq). A larger context window is important for processing long documents, multi-turn conversations, or large codebases without truncation.
Do DeepSeek V4 Flash and GPT-OSS 20B (Groq) support the Batch API?
Neither DeepSeek V4 Flash nor GPT-OSS 20B (Groq) currently supports a batch API with discounted pricing. For batch-eligible alternatives, consider models from OpenAI, Anthropic, or Google that include batch API support.
Which model offers better prompt caching?
GPT-OSS 20B (Groq) supports prompt caching at $0.04/M for cached input, while DeepSeek V4 Flash does not offer prompt caching. For RAG applications or chatbots with large, repeated context, GPT-OSS 20B (Groq)'s caching capability can substantially reduce effective costs.
What are the best use cases for DeepSeek V4 Flash vs GPT-OSS 20B (Groq)?
Both models are well-suited for General chatbot. DeepSeek V4 Flash is particularly strong for overlapping tasks. GPT-OSS 20B (Groq) is favored for Customer support, Text classification. At the same quality level, the lower-cost model is usually preferable; use this page's calculator to compare total monthly spend at your volume.
What is the cost per request for DeepSeek V4 Flash vs GPT-OSS 20B (Groq)?
At 1,000 input tokens and 500 output tokens per request — a typical conversational workload — DeepSeek V4 Flash costs $0.000280 per request and GPT-OSS 20B (Groq) costs $0.000225 per request. At 100,000 requests/month, that translates to $28.00 and $22.50 respectively. Use the interactive calculator to adjust these parameters for your actual workload.
DeepSeek V4 Flash vs GPT-OSS 20B (Groq): Summary
When comparing DeepSeek V4 Flash and GPT-OSS 20B (Groq) for API cost, the right choice depends on your workload's token profile, required features, and tolerance for latency. GPT-OSS 20B (Groq) offers lower total cost at standard usage volumes (1,000 input + 500 output tokens per request at 100,000 requests/month) at $22.50/month, compared to $28.00/month for DeepSeek V4 Flash.
Both models are priced in USD per million tokens, the standard unit across all major AI API providers. DeepSeek V4 Flash charges $0.14/M for input tokens and $0.28/M for output tokens. GPT-OSS 20B (Groq) charges $0.08/M input and $0.30/M output. If your workload is output-heavy (more tokens generated than consumed as input), the model with the lower output price compounds cost savings significantly at scale.
Prompt caching is supported by GPT-OSS 20B (Groq) but not DeepSeek V4 Flash. For workloads with large, repeated system prompts or document context — such as RAG pipelines or multi-turn conversations with a fixed knowledge base — prompt caching can reduce effective input costs by 60–90%, which may change the cost ranking between these two models at your specific usage pattern.
Context window capacity differs between the two: DeepSeek V4 Flash supports up to 1,048,576 tokens in a single request, versus 131,072 tokens for GPT-OSS 20B (Groq). A larger context window is essential for document summarization, large codebase analysis, and multi-document retrieval-augmented generation (RAG) applications.
Use the interactive calculator at the top of this page to enter your actual token usage and monthly request volume for a precise cost comparison tailored to your workload. Adjust for batch API discounts and prompt caching to find the most cost-effective option for your specific deployment.
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