DeepSeek V4 API Pricing: The Cheapest AI API?
DeepSeek just launched V4 with two tiers: a Pro model at $2.18/$8.72 and a Flash model at just $0.14/$0.28 per 1M tokens. That Flash price undercuts nearly every competitor. Let's break down what you actually get.
⚠️ Deprecation alert: Claude 4 Opus and Claude Sonnet 4 retired on June 15, 2026. If you're using these models, see our migration guide for step-by-step instructions.
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128K context
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DeepSeek V4 Flash at $0.14/$0.28 is aggressively cheap. The input price is competitive with Gemini 2.0 Flash ($0.10) and Mistral Small 4 ($0.10), but the output price of $0.28 is the lowest among all major budget models — 53% cheaper than GPT-4o mini's $0.30 output.
Budget Model Showdown
Here's how DeepSeek V4 Flash compares to every major budget-tier API:
| Model | Input/1M | Output/1M | Context | Blended* |
|---|---|---|---|---|
| DeepSeek V4 Flash | $0.14 | $0.28 | 128K | $0.19 |
| Gemini 2.0 Flash | $0.10 | $0.40 | 1M | $0.20 |
| Mistral Small 4 | $0.10 | $0.30 | 32K | $0.17 |
| GPT-oss 20B | $0.08 | $0.35 | 128K | $0.17 |
| GPT-4o mini | $0.15 | $0.60 | 128K | $0.30 |
| Claude Haiku 4.5 | $1.00 | $5.00 | 200K | $1.90 |
*Blended cost assumes a 3:1 input-to-output ratio, typical for chat workloads.
The real story: output pricing
Input prices across budget models are clustered between $0.08 and $0.15 — the differences are small. The real gap is on the output side, where prices range from $0.28 (DeepSeek V4 Flash) to $4.00 (Claude Haiku). If your workload is output-heavy, DeepSeek V4 Flash can save you up to 93% compared to Haiku.
Cost Comparison by Use Case
1. Chatbot (500 requests/day, 1500 input + 800 output tokens)
| Model | Input/mo | Output/mo | Total/mo |
|---|---|---|---|
| DeepSeek V4 Flash | $10.50 | $33.60 | $44.10 |
| Gemini 2.0 Flash | $7.50 | $48.00 | $55.50 |
| GPT-4o mini | $11.25 | $72.00 | $83.25 |
| Claude Haiku 4.5 | $75.00 | $600.00 | $675.00 |
Winner: DeepSeek V4 Flash — $44/month for a chatbot processing 15K requests. That's 20% cheaper than Gemini Flash and 94% cheaper than Claude Haiku.
2. Code Assistant (200 requests/day, 2000 input + 1500 output tokens)
| Model | Input/mo | Output/mo | Total/mo |
|---|---|---|---|
| DeepSeek V4 Flash | $5.60 | $25.20 | $30.80 |
| Gemini 2.0 Flash | $4.00 | $36.00 | $40.00 |
| GPT-4o mini | $6.00 | $54.00 | $60.00 |
| Claude Haiku 4.5 | $40.00 | $450.00 | $490.00 |
Winner: DeepSeek V4 Flash — $31/month for a code assistant. Output-heavy workloads amplify the savings.
3. Document Classification (1000 requests/day, 500 input + 100 output tokens)
| Model | Input/mo | Output/mo | Total/mo |
|---|---|---|---|
| GPT-oss 20B | $1.20 | $1.05 | $2.25 |
| DeepSeek V4 Flash | $2.10 | $0.84 | $2.94 |
| Gemini 2.0 Flash | $1.50 | $1.20 | $2.70 |
| GPT-4o mini | $2.25 | $1.80 | $4.05 |
Winner: GPT-oss 20B — for input-heavy classification tasks, the cheapest input price ($0.08) wins. DeepSeek V4 Flash is a close second.
DeepSeek V4 Pro: The Mid-Tier Option
At $2.18/$8.72, DeepSeek V4 Pro sits in mid-tier territory. How does it compare?
| Model | Input/1M | Output/1M | Context |
|---|---|---|---|
| DeepSeek V4 Pro | $2.18 | $8.72 | 128K |
| Claude Sonnet 4 | $3.00 | $15.00 | 200K |
| GPT-4o | $2.50 | $10.00 | 128K |
| Gemini 2.5 Pro | $1.25 | $10.00 | 1M |
| Mistral Large 3 | $2.00 | $6.00 | 128K |
DeepSeek V4 Pro is cheaper than Claude Sonnet 4 and GPT-4o on both input and output. It's more expensive than Gemini 2.5 Pro on input but cheaper on output. For teams that need stronger reasoning than budget models but don't want to pay flagship prices, V4 Pro is a compelling middle ground.
When to Choose DeepSeek V4
- V4 Flash: You need the absolute lowest cost for high-volume, output-heavy workloads (chatbots, code assistants, content generation)
- V4 Flash: You're processing millions of tokens daily and every fraction of a cent matters
- V4 Pro: You need stronger reasoning than budget models but Claude Sonnet/GPT-4o pricing is too high
- V4 Pro: You're building internal tools where cost matters more than brand-name models
When to Avoid DeepSeek
- You need a 1M+ context window (DeepSeek maxes out at 128K)
- You require guaranteed uptime SLAs from a US-based provider
- Your compliance requirements mandate US-only data processing
- You need advanced multimodal capabilities (vision, audio)
- You're building on OpenAI's Assistants API or Anthropic's tool use ecosystem
The Data Residency Question
Where does your data go?
DeepSeek is a Chinese company. While they offer an API hosted on international infrastructure, organizations with strict data residency requirements (GDPR, HIPAA, SOC 2) should verify where their data is processed. For sensitive workloads, consider US/EU-based alternatives even if they cost more.
Cost Optimization with DeepSeek
- Tier your models: Use V4 Flash for high-volume simple tasks, V4 Pro for complex reasoning
- Set max_tokens: At $0.28/1M output, runaway generation is still wasteful at scale
- Cache prompts: DeepSeek supports prompt caching — reuse system prompts to reduce input costs
- Batch processing: For offline workloads, batch requests to maximize throughput
Calculate your DeepSeek costs: Use our free calculator to see exactly what DeepSeek V4 would cost for your workload — and compare it side-by-side with every other provider.
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