Flux 3 API Pricing Review: Image and Video Costs (2026)

Flux 3 API pricing looks simple until you get the bill: a 1K image can cost $0.009 or $0.048 depending on which Flux 3 you call, and 30 seconds of video output can cost $5.40 or $36.90 before retries. The cheapest path is Klein plus Draft for iteration, then flagship Image or HD 720p for keepers, provided you count resolution tiers and provider markups first.

What a Flux 3 API call costs right now

Flux 3 is not one price. Black Forest Labs sells three core billable products under the name: FLUX 3 Image, FLUX 3 Image Klein, and FLUX 3 Video, all live on the official BFL pricing page and documented in BFL API docs. Max is a separate luxury tier priced on its own. As of November 2026 the anchors are $0.048 per 1K flagship image, $0.009 per 1K Klein image, and $0.15 per second for HD video with audio included. Everything else is resolution and provider markup.

One BFL credit equals $0.01, and only successful Ready generations consume credits per BFL billing docs. Failed and moderated requests are not charged. That rule matters because video work needs retries.

Image pricing: flagship vs Klein and the 4K trap

FLUX 3 Image and Klein share resolution tiers but not prices. Both bill by total pixel area at fixed tiers, not per megapixel like FLUX.2, per the official rate card. Reference images (up to 10) and editing cost the same as text-to-image on both FLUX 3 image endpoints, a real change from FLUX.2 where each reference added $0.015 to $0.05 per megapixel.

The 4K jump is the trap. Flagship Image rises from $0.10 at 2K to $0.607 at 4K, about 6x the price for about 4x the pixels. Klein moves from $0.014 to $0.036 on the same step. At 4K the flagship costs roughly 17x Klein.

What that means for volume:

Is Klein good enough to pocket the 5x difference? For drafts, headshots, logos, and most 1K work, yes. In October side-by-side runs, Klein produced usable ads, headshots, and a logo at 1.2 to 1.8 cents each, while flagship Image kept faces well but misspelled display text ("cruelty" as "crualty") at 5x the cost. Test typography-heavy posters on both before committing. For volume, Klein wins by default.

For deeper edit behavior, see our Flux 3 Image Klein tested review and the hosted Flux 3 Klein model page.

Video pricing: what a 5-second and 30-second clip cost

FLUX 3 Video bills per output second, audio included, with a 20-second cap per generation and partial seconds rounded up, per BFL video docs. Text-to-video and image-to-video share rates. Continuing or extending a video costs more than generating it. All 30-second figures below mean 30 aggregate output seconds assembled from multiple generations, not one call.

FHD and above are finished by an upsampler but billed at the delivered tier. BFL cut these rates in mid-October (HD $0.17 to $0.15, FHD $0.29 to $0.24, 2K $0.40 to $0.28, 4K $0.80 to $0.41, tracked here), so older guides showing $0.17/$0.29 are stale.

One try is not a budget. The table below treats three attempts per keeper (one plus two retries) as an example scenario, not a fixed production norm. Discarded but successful generations still bill, while failed or moderated calls do not.

A 5-second HD keeper costs about $0.75 on the first try and about $2.25 under the 3x example. The same 5 seconds in Draft costs $0.30 and about $0.90 usable. Draft renders at 720p and can later be upgraded with draft_enhance, though an enhanced Draft is not pixel-identical to a native full-tier render. Use Draft to lock motion, then pay full rate for keepers.

Two add-ons sit outside the clip table, per BFL-linked rate tracking. FLUX Video Edit (fast) restyles up to 15 seconds at 720p for $0.03/sec. Video upscalers bill per megapixel-second: Precise at $0.035 and Creative at $0.05, with a 20-second input cap. Budget them separately.

Dialogue, lip-sync, and effects ship in the same seconds at no extra line item, which is why per-second comparisons against silent models understate Flux 3 when you need sound.

For hosted video access, see Flux 3 Video and our Flux 3 Max video pricing breakdown, which covers the higher-end Max tier separately. Max is excluded from the table above and should be priced on its own.

BFL direct vs fal vs Replicate vs OpenRouter

BFL direct is the reference price and the cheapest video route. Image resellers can undercut BFL on specific models, but each video reseller checked in November was more expensive than BFL direct at matched resolution.

Reseller image and video rates above are November listings aggregated across GenMagic's provider comparison, Model Menu, and Allocate; video equivalents exclude platform fees and taxes. Replicate's $0.024 flagship 1K image is half BFL's price and the cheapest flagship-image route found. For Klein and FLUX.2 volume without a BFL account, fal mirrors BFL image rates and lists FLUX.2 [klein] 4B around $0.005 per megapixel versus BFL's $0.014. Video flips: expect roughly +13% at 720p and +20% at 1080p through resellers.

Subscription storefronts look cheaper until credits are normalized. Per third-party tracking, a 5-second 720p clip is listed around $0.60 on a large Luma monthly plan and about $1.05 on Krea's compared monthly plan versus $0.75 pay-as-you-go on BFL. Those figures assume each credit goes to Flux 3 on a $165 to $300/month plan, with annual-commit variants near $0.50 to $0.63. If you already live in Luma for HD/FHD work, its partner rate can beat BFL. If you need Draft, QHD, UHD, or no subscription, BFL direct wins.

Billing rules that rewrite the sticker price

The headline rate is only half the invoice. Five mechanics decide what you pay.

Credits, minimums, and expiry. BFL is prepaid through Stripe, 1 credit = $0.01, no subscription or seat fee, no free credits for new API accounts. Suggested first top-up is $10 to $20 with auto top-up at $5. Credits expire 12 months after purchase and are non-refundable under developer terms, even though an older help article says otherwise. The contract controls.

What counts as billable. Only Ready generations bill, per BFL billing docs. Failed, refused, and moderation-blocked calls cost nothing, and the API response states the request cost in credits. Result URLs expire quickly (about 1 hour for FLUX 3 Image, 2 hours for video), and BFL links do not support browser CORS, so fetch server-side.

Concurrency. Account concurrency caps at 24 simultaneous tasks, but only 5 for FLUX 3 Video, per BFL-linked API guides. Over that you get HTTP 429. Treat it as a signal to wait, not to hammer retry.

Commercial use and training opt-out. You own outputs and may use them commercially, but may not use them to train or distill another model. BFL's service terms allow training on API inputs and outputs with an email opt-out. There is no zero-retention switch.

Weights vs API. Only Klein has downloadable weights under the FLUX Kommunity License: free commercial use under $5M annualized revenue, paid license above it, per Klein pricing and license guide. The INT8 generator runs on an 8GB consumer GPU, but the prompt upsampler Klein needs for full quality adds about 28GB locally. Flagship Image and Video are API-only. A separate gripe captures the top-end pain:

"respectfully, nobody can afford FLUX 3 Max" — @lutjenlee, X post

Which route fits three budgets

Pick by volume and resolution, not by logo. Numbers below use current BFL direct rates with one-try math. Multiply video by ~3x for keepers.

Never ship 4K flagship at volume without a client paying for it ($607 per 1,000 vs $36 Klein). Never compare a subscription "per clip" price without dividing by the plan you will buy. Start Draft and Klein, promote only keepers, and re-check bfl.ai/pricing before locking a quote. October's 12 to 49% cuts show how fast this table moves.

FAQ

Is Flux 3 Image Klein good enough for production?

For drafts, headshots, logos, staging, and most 1K work, yes at one-fifth of flagship. Reserve flagship Image for final faces, dense layouts, and native 16.8 MP 4K where Klein's artifacts show.

Who is cheapest for the Flux 3 API?

For flagship 1K images, Replicate at ~$0.024 undercuts BFL direct. For video at matched resolution, BFL direct beats each reseller checked. Subscription apps need $100+/month plans fully spent on Flux 3 to look cheaper.

Can I use Flux 3 commercially and self-host it?

API outputs are commercially usable. Only Klein weights are downloadable, free for commercial use under $5M revenue under the Kommunity License. Flagship and video need the paid API or a negotiated commercial weights license.

Why is 4K flagship so expensive?

4K flagship delivers ~16.8 MP in one call and bills $0.607 versus $0.10 at 2K. Unless the deliverable is native 4K print or hero art, ship 2K and upscale. Or use Klein 4K at $0.036 and spend the savings on retries.

Price the call you are making (endpoint, resolution, and provider) and ignore any comparison that does not state all three. "Flux 3" currently covers flagship Image, Klein, standard Video, and Max in one label, which is why headline prices disagree.