What is the total cost difference between these two budget models?

Both are budget-tier models, but the cost split is asymmetric. GPT-5 Mini is 43% cheaper on input tokens but 57% more expensive on output tokens. For a balanced workload of 1M input + 1M output, DeepSeek V4 Pro costs $1.31 while GPT-5 Mini costs $2.25 — DeepSeek saves $0.94 (42% cheaper overall). But at 10M input + 1M output, GPT-5 Mini costs $4.50 vs DeepSeek's $5.27 — GPT-5 Mini saves $0.77.

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Budget Budget

DeepSeek V4 Pro vs GPT-5 Mini

Q: Which has a larger context window?

DeepSeek V4 Pro has a much larger context window at 1M tokens vs GPT-5 Mini's 272K tokens. That's 3.7x more context, making DeepSeek V4 Pro significantly better for long-document processing, large codebases, and tasks requiring extensive conversation history.

Two budget champions, different strengths. GPT-5 Mini is 43% cheaper on input ($0.25 vs $0.44) but DeepSeek V4 Pro is 57% cheaper on output ($0.87 vs $2.00). DeepSeek also has 3.7x the context window (1M vs 272K). Which budget model wins for your workload?

Pricing data verified: Jul 3, 2026

Specification	DeepSeek V4 Pro (DeepSeek)	GPT-5 Mini (OpenAI)
Input Price (per 1M tokens)	$0.44	$0.25
Output Price (per 1M tokens)	$0.87	$2.00
Context Window	1M tokens	272K tokens
Tier	Budget	Budget
Provider	DeepSeek	OpenAI

Calculate Your Exact Costs

GPT-5 Mini wins on input-heavy workloads. DeepSeek V4 Pro wins on output-heavy. Enter your usage to find the cheaper model for you.

Input Tokens per Request

Output Tokens per Request

Requests per Day

Days per Month

DeepSeek

DeepSeek V4 Pro

$0.00

per month

Input cost

Output cost

Cost per request

Requests/month

OpenAI

GPT-5 Mini

$0.00

per month

Input cost

Output cost

Cost per request

Requests/month

Other Budget and Mid-Tier Models

Gemini 3.5 Flash

Google

$0.075 / $0.30 per 1M

1M context

GPT-5.4

OpenAI

$2.50 / $15.00 per 1M

400K context

Claude Sonnet 5

Anthropic

$3.00 / $15 per 1M

1M context

Which Model for Which Use Case?

Code Generation

Both are budget powerhouses for coding. GPT-5 Mini ($0.25/$2.00) is cheaper when you paste large codebases as input for small edits. DeepSeek V4 Pro ($0.44/$0.87) is cheaper when generating large amounts of code output. For most coding workflows that generate more output than input, DeepSeek V4 Pro offers better value.

Output-heavy coding: DeepSeek V4 Pro | Input-heavy review: GPT-5 Mini

Content Generation

Blog posts, marketing copy, and documentation all produce large output tokens. At $0.87/1M output, DeepSeek V4 Pro is 57% cheaper than GPT-5 Mini ($2.00/1M) for generation tasks. For a 3000-word article (~4K output tokens), DeepSeek V4 Pro costs $0.0035 vs GPT-5 Mini's $0.008 — small per-article but massive at scale.

Better value: DeepSeek V4 Pro

Long-Context Processing

DeepSeek V4 Pro's 1M context window is 3.7x larger than GPT-5 Mini's 272K. If your workload involves long documents, large codebases, or extended conversations exceeding 272K tokens, DeepSeek V4 Pro is the only viable option between these two budget models.

3.7x more context: DeepSeek V4 Pro

Input-Heavy Batch Processing

When you're feeding massive datasets for classification, extraction, or analysis with relatively little output, GPT-5 Mini's $0.25 input price shines. At 10M input + 1M output, GPT-5 Mini costs $4.50 vs DeepSeek V4 Pro's $5.27. For input-dominated workloads, GPT-5 Mini saves $0.77 per batch.

Input-heavy batches: GPT-5 Mini | Output-heavy batches: DeepSeek V4 Pro

Comparing budget AI models?

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Frequently Asked Questions

Which is cheaper, DeepSeek V4 Pro or GPT-5 Mini?

It depends on your workload mix. GPT-5 Mini is cheaper on input at $0.25/1M vs DeepSeek V4 Pro's $0.44/1M (43% cheaper). But DeepSeek V4 Pro is cheaper on output at $0.87/1M vs GPT-5 Mini's $2.00/1M (57% cheaper). For a balanced 1M input + 1M output workload, DeepSeek V4 Pro costs $1.31 vs GPT-5 Mini's $2.25 — DeepSeek saves $0.94. For input-heavy workloads (10M input + 1M output), GPT-5 Mini costs $4.50 vs DeepSeek's $5.27 — GPT-5 Mini saves $0.77.

Which has a larger context window?

DeepSeek V4 Pro has a much larger context at 1M tokens vs GPT-5 Mini's 272K tokens — 3.7x more context. If your workload involves long documents, large codebases, or extended conversations, DeepSeek V4 Pro is the clear winner on both context size and output cost.

When should I use GPT-5 Mini over DeepSeek V4 Pro?

Choose GPT-5 Mini ($0.25/$2.00) when your workload is input-heavy — lots of context or prompts with relatively little output. At 10M input + 1M output, GPT-5 Mini costs $4.50 vs DeepSeek V4 Pro's $5.27, saving $0.77. GPT-5 Mini also benefits from OpenAI's ecosystem integration and tooling.

When should I use DeepSeek V4 Pro over GPT-5 Mini?

Choose DeepSeek V4 Pro ($0.44/$0.87) when your workload is output-heavy — content generation, code generation, summarization, or any task producing large amounts of text. At 1M input + 10M output, DeepSeek V4 Pro costs $9.14 vs GPT-5 Mini's $20.25, saving $11.11. DeepSeek V4 Pro also offers a 3.7x larger context window (1M vs 272K).

Are both models budget-tier?

Yes, both DeepSeek V4 Pro and GPT-5 Mini are classified as budget-tier models — the cheapest from their respective providers. But the pricing structure is very different: GPT-5 Mini has a low input price but higher output price ($0.25/$2.00), while DeepSeek V4 Pro has higher input but much lower output ($0.44/$0.87). The "cheapest" model depends entirely on your input/output ratio.