Which is cheaper, GPT-5 mini or DeepSeek R2?

GPT-5 mini is cheaper at the input + output rate combined: $2.25 versus $2.75 per million tokens.

Which has higher quality, GPT-5 mini or DeepSeek R2?

DeepSeek R2 has the higher AA Intelligence Index score: 86 versus 84.

Can I switch between GPT-5 mini and DeepSeek R2 via one API?

Both GPT-5 mini and DeepSeek R2 are accessible through OpenRouter's unified gateway, which lets you switch models with one API key. Phase 2 of AIpricly will add scenario-routed automatic primary + fallback chains.

GPT-5 mini vs DeepSeek R2

Side-by-side pricing, capabilities, real-world cost across common scenarios, and our editorial pick.

Add a modelUp to 4 models can be compared

all prices in USD per 1M tokens

OVERALL WINNER

GPT-5 mini

OpenAI · released 2026-01-15

Quality (AA Index)84

Input price$0.25

Output price$2.00

Context400K

Throughput280 tok/s

P50 latency0.3s

View full pricing

DeepSeek R2

DeepSeek · released 2026-02-15

Quality (AA Index)86

Input price$0.55

Output price$2.20

Context128K

Throughput110 tok/s

P50 latency1.2s

View full pricing

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Head-to-head specs

Green column = winner per metric

Metric	GPT-5 mini	DeepSeek R2	Verdict
Input price /1M tokens	$0.25	$0.55	GPT-5 mini −55%
Output price /1M tokens	$2.00	$2.20	GPT-5 mini −9%
Context window max input length	400K	128K	GPT-5 mini +3.1×
AA Quality AA Intelligence Index (0–100)	84	86	DeepSeek R2 +2pt
Arena Elo LMArena human-pref Elo (800–2000)	—	—	Tied
Throughput tokens per second	280	110	GPT-5 mini +155%
P50 latency first token	0.3s	1.2s	GPT-5 mini −75%
Vision multimodal		—
Function calling tool use			Tied
Reasoning mode chain-of-thought			Tied

Monthly cost across common scenarios

Default usage assumptions

Scenario	GPT-5 mini	DeepSeek R2
customer support 1000K req · 600/180 tok	$510	$726
chat with docs 300K req · 4000/300 tok	$480	$858
code generation 500K req · 2000/500 tok	$750	$1.1K
voice assistant 600K req · 800/200 tok	$360	$528

Our pick

For most workloads, choose GPT-5 mini.

55% cheaper input price, which compounds at scale
3.1× the context window — better for long documents and agents
155% faster throughput — matters for streaming UX and voice agents

GPT-5 family inheritance at a fraction of the cost — strong on routine tasks but visibly weaker on multi-step reasoning. Default choice when GPT-5 is overkill.

Choose DeepSeek R2 instead if: Tradeoffs for this pair have not yet been documented. The quality difference may be small enough that workload fit, integration cost, and team familiarity decide the choice.

Read our deep analysis

The Cheapest LLM API for Production in 2026

Why pick? Use both with smart routing

Phase 2 · gateway with fallback chain

Set GPT-5 mini as primary, DeepSeek R2 as fallback. One key, one bill, automatic failover when GPT-5 mini errors.

PHASE 2 PREVIEW · gateway not live yetThis endpoint does not exist yet. The gateway is in Phase 2 — what you see below is a design preview of the planned interface, not a live API. We will email subscribers when it launches.

Preview the planned API call

$ curl https://api.aipricly.com/v1/chat/completions \
  -H "Authorization: Bearer $AIPC_KEY" \
  -d '{
    "routing": {
      "primary": "openai/gpt-5-mini",
      "fallback": ["deepseek/deepseek-r2"]
    },
    "messages": [{"role": "user", "content": "..."}]
  }'