OpenAI's GPT Image 2 shipped April 21, 2026, and there are now several real ways to call it via API. Unlike some model comparisons, there isn't one clean "cheapest overall" answer here, it depends on which quality tier you're generating at, and on whether you want pay-as-you-go or a subscription's better bundled rate.
Quick comparison (per image, 1024x1024)
| Provider | Low quality | Medium quality | High quality |
|---|---|---|---|
| Apiframe (pay-as-you-go) | $0.04 | $0.09 | $0.23 |
| Apiframe (Growth-plan effective) | ~$0.015 | ~$0.034 | ~$0.088 |
| fal.ai | $0.006 | $0.053 | $0.211 |
| PiAPI (gpt-image-2, token-based, 1024x1024) | ~$0.008 | ~$0.032 | ~$0.125 |
| PiAPI (gpt-image-2-preview, flat, any quality) | $0.10 | $0.10 | $0.10 |
1. Apiframe
Apiframe wraps GPT Image 2 into the same API key and billing used for every other model on the platform, so it's one integration that happens to include GPT Image 2, not a GPT Image-specific one. Requests are async, submit a job, then poll or get a webhook, no separate OpenAI account required. Full parameter reference is in the GPT Image 2 docs, or try it in Apiframe Studio without writing code. For a full walkthrough with code samples, see the GPT Image 2 API guide.
Pricing is credit-based, flat per image by quality tier: 4 credits ($0.04) low, 9 ($0.09) medium, 23 ($0.23) high or auto, at the pay-as-you-go rate. Paid monthly plans bundle credits cheaper, down to $0.00383/credit on Growth ($199/mo, 52,000 credits), which brings those same tiers to about $0.015, $0.034, and $0.088. One real scope limitation: Apiframe only exposes 3 aspect ratios (1:1, 3:2, 2:3) with no explicit resolution selector, covered in more detail below.
Best for: teams already using, or planning to use, other models on Apiframe, and specifically for high-quality generation at plan-level volume, where its effective rate is the cheapest of the group checked here.
2. fal.ai
fal.ai passes through OpenAI's own token-based pricing directly, with a published table by resolution and quality: $0.006 for low quality at 1024x1024, up to $0.211 for high quality at the same size, scaling further at larger sizes (a 3840x2160 high-quality image runs $0.401). Supports both preset sizes and fully custom dimensions up to 4K, with aspect ratios as wide as 3:1, the most flexible resolution and aspect-ratio support of the four providers checked here. Image editing supports mask-based inpainting and outpainting, a capability none of the other three providers explicitly document.
Best for: the cheapest confirmed low-quality rate, plus the widest resolution and aspect-ratio flexibility of the group.
3. PiAPI
PiAPI offers two distinct ways to call GPT Image 2. The token-based gpt-image-2 model mirrors OpenAI's real rates ($8/1M image input tokens, $30/1M output tokens), working out to roughly $0.008 low, $0.032 medium, and $0.125 high quality at 1024x1024. Separately, gpt-image-2-preview charges a flat $0.10 per image regardless of size or quality, the only flat-rate option among the four providers here, useful if you want predictable per-call cost rather than a variable, quality-dependent rate.
Best for: predictable flat-rate pricing via the preview model, or the token-based model if you want costs to scale down at lower quality settings.
4. Kie.ai
Kie.ai's GPT Image 2 endpoint stands out on both parameters and price. It exposes 16 aspect ratio options (including 21:9, 9:21, 3:1, and 1:3) and an explicit 1K/2K/4K resolution selector, both text-to-image and image-to-image endpoints are available. Pricing is credit-based and tied to resolution rather than a quality tier: 6 credits ($0.03) at 1K, 10 credits ($0.05) at 2K, and 16 credits ($0.08) at 4K, with high-tier top-ups adding a bonus that brings the effective rate down about 10% further.
At every resolution checked, this is the cheapest confirmed rate of the four providers here, and by a wide margin at 4K specifically, where the next-closest option (fal.ai, at the equivalent 3840x2160 high-quality size) costs roughly 5x more.
Best for: the cheapest confirmed rate at any resolution, and especially at 4K, plus the widest resolution and aspect-ratio control of the group.
The resolution and aspect-ratio gap worth knowing
Apiframe's own marketing copy describes GPT Image 2 as supporting "up to 2K resolution," but the actual parameter set has no resolution or size field, only 3 aspect ratios, with output size implied by the quality setting rather than something you can directly request. Kie.ai, by contrast, has an explicit resolution selector going up to 4K and more than five times as many aspect ratio options. fal.ai also supports custom dimensions up to 4K. If your project needs a specific resolution or an unusual aspect ratio (banner formats, ultra-wide, portrait-heavy social formats), Apiframe's current parameter set is the narrowest of the four, worth checking before committing if that matters for your use case.
Which one should you actually use?
If you're already building on Apiframe for other models and generating mostly at high quality, staying on one key and bill is the practical choice, and at plan-level volume it's the cheapest option checked here for that tier. For the cheapest low-quality rate and the widest resolution/aspect-ratio flexibility, fal.ai. For predictable flat-rate pricing regardless of quality, PiAPI's preview model. For explicit resolution control up to 4K and unusual aspect ratios, Kie.ai, just verify its pricing directly first.
Get an API key and start with free credits, or go straight to the GPT Image 2 model page for full specs and code examples.
FAQ
Is there an official GPT Image 2 API directly from OpenAI?
Yes, through OpenAI's own API platform, token-based billing. All four providers above offer an alternative route with different pricing structures and, in some cases, additional features like mask-based editing or wider resolution options.
Which provider has the cheapest GPT Image 2 rate?
Kie.ai, once verified directly, at every resolution checked, and dramatically so at 4K ($0.08 versus fal.ai's $0.401 for an equivalent-size high-quality image). For the cheapest low-quality, quick-draft rate specifically, fal.ai (roughly $0.005-$0.01, its own site isn't fully consistent, see below) or PiAPI's token-based model (~$0.008) still undercut Kie.ai, since Kie.ai doesn't offer a comparably stripped-down cheap tier.
Why isn't there one single, simple "cheapest provider" answer?
Because the pricing structures aren't shaped the same way: Apiframe, fal.ai, and PiAPI's token-based model scale by quality tier, PiAPI's preview model is a flat rate regardless of quality, and Kie.ai scales by resolution instead of quality. Match the comparison to what you're actually generating rather than assuming the raw dollar figures are interchangeable.
Does every provider support image editing?
Yes, all four support passing reference images for editing. fal.ai's mask-based inpainting/outpainting is the most explicitly documented editing capability of the group.
Do these providers require a separate OpenAI account?
No, that's the point of using a third-party API. Only calling OpenAI's own API platform directly requires one.