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Black Forest Labs

FLUX.1 Kontext [dev]

VS
OpenAI

GPT Image 1.5

✍️ Analysis by:the whichllmmodel Editorial Team|📅 Updated: June 2026

Decision Recommendation

👑 Editorial Verdict: GPT Image 1.5 stands out as the superior choice over FLUX.1 Kontext [dev]. It is more cost-effective (costing $0.0340 per image vs $N/A), generates images in a faster speed tier (fast), and supports a wider range of key feature strengths (like Text Rendering, In-Context Editing, Prompt Adherence).

Model Specs

FLUX.1 Kontext [dev]

Pricing & Speed

Cost per Generation
Self Host
Speed Tier
standard
Max Resolution2K

Model Strengths

In-Context EditingCharacter ConsistencyPrompt Adherence
Model Specs

GPT Image 1.5

Pricing & Speed

Cost per Generation
$34.00per 1,000 images
Speed TierFaster
fast
Max Resolution1.5K

Model Strengths

Text RenderingIn-Context EditingPrompt AdherenceCharacter Consistency

Frequently Asked Questions

FLUX.1 Kontext [dev] is cheaper as it is open source and can be self-hosted, whereas GPT Image 1.5 costs $0.0340 per image generation.

GPT Image 1.5 is faster, operating in the fast speed tier compared to FLUX.1 Kontext [dev] which is in the standard speed tier.

Both models share key strengths in: in context-editing, character consistency, prompt adherence. FLUX.1 Kontext [dev] specializes in: in context-editing, character consistency, prompt adherence. GPT Image 1.5 specializes in: text rendering, in context-editing, prompt adherence, character consistency.

Neither FLUX.1 Kontext [dev] nor GPT Image 1.5 lists photorealism as a primary specialized strength, though both can generate realistic images depending on prompt engineering.

Both FLUX.1 Kontext [dev] and GPT Image 1.5 excel at maintaining character consistency across multiple image generations.

GPT Image 1.5 is better for text rendering and typography, specializing in generating accurate and readable text within images, whereas FLUX.1 Kontext [dev] does not specify this strength.

Both models support image editing. FLUX.1 Kontext [dev] specializes in in context-editing, while GPT Image 1.5 excels at in context-editing.

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