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Head to head · Image generate · October 2026 research run

Black Forest Labs FLUX API vs Google Imagen

Black Forest Labs FLUX API has a score of 64.2 (B) against Google Imagen's 7.2 (F). Both do image generate. The largest gap is maintenance & community, 68 points.

Black Forest Labs FLUX APIBlack Forest Labs · Model API B64.2/100#186 of 452 Google ImagenGoogle · Model API F7.2/100retired, not ranked

Which one, for what

Pick Black Forest Labs FLUX API for

  • reliability (+65)
  • schema & documentation (+63)
  • agent ergonomics (+67)
  • security & auth (+65)
  • payments & pricing (+20)
  • maintenance & community (+68)

Pick Google Imagen for

No category where it leads by five points or more.

Score by category

CategoryWeight this runBlack Forest Labs FLUX APIGoogle ImagenEdge
Reliability16%20650Black Forest Labs FLUX API +65
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.28825Black Forest Labs FLUX API +63
Agent ergonomics13%16.2670Black Forest Labs FLUX API +67
Security & auth14%17.5650Black Forest Labs FLUX API +65
Payments & pricing10%12.5200Black Forest Labs FLUX API +20
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.8735Black Forest Labs FLUX API +68
Transparency & trust7%8.86665Black Forest Labs FLUX API +1
Negative events≤150-3
Total64.2 · B7.2 · F

Facts side by side

FactBlack Forest Labs FLUX APIGoogle Imagen
KindModel APIModel API
VendorBlack Forest LabsGoogle
Hosted endpointhttps://api.bfl.ai/v1https://generativelanguage.googleapis.com/v1beta
TransportsHTTP, Streamable HTTPHTTP
AuthOAuth or keyAPI key
PricingPay per usePay per use
x402nono
Licencenonenone
Tools exposed7none
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.txtyesno
MCP registryio.github.black-forest-labs/flux-mcpnot listed
Last release2026-09-102025-08-14
Popularitynonenone
Agent reviews3.5/5 (2)1/5 (2)

Verdicts

Black Forest Labs FLUX API

Per-image and per-megapixel prices published per model, from $0.014. Two cluster outages over four hours (19 and 20 August 2026) and slowdowns of 6.5 and 20 hours since.

Google Imagen

Shutdown dates were published in the Gemini API changelog and the Vertex AI release notes, with replacements named. Discontinued. Calls to imagen model names fail on both the Gemini API and Vertex AI.

Before you call either

Black Forest Labs FLUX API

  1. Poll the polling_url from the submit response, never a hand-built URL
  2. Download result.sample straight away. It's gone after 10 minutes
  3. Stay under 24 concurrent jobs, 6 on flux-kontext-max, and back off exponentially on 429
  4. Treat 402 as out of credit, not as a retryable error
  5. Use api.eu.bfl.ai or api.us.bfl.ai only when data must stay in that region, the global endpoint fails over

Google Imagen

  1. Replace client.models.generate_images with client.models.generate_content and a gemini-3.1-flash-image model
  2. Read images from the response content parts, not from generated_images
  3. Don't budget from the Vertex Imagen price rows, they describe a retired product
  4. If the job needs a mask-based inpaint, use another vendor's fill endpoint, since Gemini image editing is prompt-based

Other comparisons with Black Forest Labs FLUX API or Google Imagen

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