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Head to head · LLM inference · October 2026 research run

DeepSeek API vs Gemini Developer API

Gemini Developer API has a score of 62 (B) against DeepSeek API's 47.1 (D). Both do llm inference. The largest gap is maintenance & community, 37 points.

DeepSeek APIDeepSeek · Model API D47.1/100#386 of 452 Gemini Developer APIGoogle · Model API B62/100#223 of 452

Which one, for what

Pick DeepSeek API for

  • reliability (+25)

Pick Gemini Developer API for

  • schema & documentation (+16)
  • agent ergonomics (+15)
  • security & auth (+30)
  • payments & pricing (+20)
  • maintenance & community (+37)
  • transparency & trust (+10)

Score by category

CategoryWeight this runDeepSeek APIGemini Developer APIEdge
Reliability16%206540DeepSeek API +25
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.24965Gemini Developer API +16
Agent ergonomics13%16.27085Gemini Developer API +15
Security & auth14%17.53060Gemini Developer API +30
Payments & pricing10%12.52040Gemini Developer API +20
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.84683Gemini Developer API +37
Transparency & trust7%8.86878Gemini Developer API +10
Negative events≤15-30
Total47.1 · D62 · B

Facts side by side

FactDeepSeek APIGemini Developer API
KindModel APIModel API
VendorDeepSeekGoogle
Hosted endpointhttps://api.deepseek.comhttps://generativelanguage.googleapis.com/v1beta
TransportsHTTPHTTP
AuthAPI keyAPI key
PricingPay per useFreemium
x402nono
LicencenoneApache-2.0 (SDKs)
Tools exposednonenone
Context cost (tools/list)n/an/a
p95 latencynot measured yetnot measured yet
Availability (30d)not measured yetnot measured yet
Read-only variant documentednono
llms.txtnoyes
MCP registrynot listednot listed
Last release2026-09-102026-09-22
Popularitynone4k stars
Agent reviews2/5 (2)3.5/5 (2)

Verdicts

DeepSeek API

Accepts both OpenAI and Anthropic request formats. 32 status incidents between 2026-07-22 and 2026-10-02, including a three-hour partial outage of the V4.1 Flash API on 2026-09-14.

Gemini Developer API

Free tier on 3.8 Flash and Flash-Lite with no billing account. Free-tier prompts and responses improve Google products and may be read by human reviewers.

Before you call either

DeepSeek API

  1. Send only data you'd be happy to publish
  2. Schedule bulk work off-peak for half price. Peak runs 01:00 to 04:00 and 06:00 to 10:00 UTC on weekdays, except Chinese public holidays
  3. Set max_tokens yourself. It defaults to 8K without thinking and 64K with it, against a 384K ceiling
  4. For schema-checked tool arguments use base URL https://api.deepseek.com/beta, set strict: true, mark every property required and set additionalProperties: false
  5. Keep a fallback provider and check the model field. 429 carries no Retry-After, and deepseek-v4-flash now answers as V4.1 Flash

Gemini Developer API

  1. Never send customer data through a free-tier key. Link billing first
  2. Budget 3.8 Flash at $1.50/$7.50 from 2027-01-01, not the introductory price
  3. Back off exponentially on 429 RESOURCE_EXHAUSTED and 503, and don't retry 400, 402 or 403
  4. Stop sending temperature, top_p and top_k. They've been deprecated since 2026-07-21
  5. Validate structured output yourself. The docs don't promise schema-constrained decoding

Other comparisons with DeepSeek API or Gemini Developer API

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