Compare

FLUX.1 Kontext [Max] vs GPT Image 2.5 Sunburst

Pricing per million tokens, context window, capabilities — pulled from each provider's public docs. All 2 are available via the same AIgateway OpenAI-compatible endpoint; flip the model string to switch.

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FLUX.1 Kontext [Max]
black-forest-labs/flux-1-kontext-max
GPT Image 2.5 Sunburst
openai/gpt-image-2.5-sunburst
Provider
Black Forest Labs
OpenAI
Family
FLUX
Modality
image
image
Context window
Max output
Released
2026-08-19
2026-09-10
License
Open-weight
Proprietary
Per image
$0.080 /img
$0.030 /img
Tools
Streaming
Vision
JSON mode
Reasoning
Prompt caching
Batch API
Try it
View model →
View model →
FLUX.1 Kontext [Max]
black-forest-labs/flux-1-kontext-max
Full spec →

FLUX.1 Kontext [max] is Black Forest Labs' highest-quality Kontext model for text-to-image generation and context-aware image editing.

Strengths
  • Text-to-image generation
  • Creative control
Use cases
Marketing assetsProduct mockupsConcept art
GPT Image 2.5 Sunburst
openai/gpt-image-2.5-sunburst
Full spec →

OpenAI's most capable image generation and editing model. It accepts text and image inputs and produces images with low, medium, high, xhigh, max, and auto quality settings.

Strengths
  • Text-to-image generation
  • Creative control
Use cases
Marketing assetsProduct mockupsConcept art

Compare with another

Claude Fable 5.1 vs GPT Image 2.5 Sunburst
anthropic/claude-fable-5.1 · openai/gpt-image-2.5-sunburst
Claude Fable 5.1 vs FLUX.1 Kontext [Max]
anthropic/claude-fable-5.1 · black-forest-labs/flux-1-kontext-max
Gemini 3.8 Flash vs GPT Image 2.5 Sunburst
google/gemini-3.8-flash · openai/gpt-image-2.5-sunburst
Gemini 3.8 Flash vs FLUX.1 Kontext [Max]
google/gemini-3.8-flash · black-forest-labs/flux-1-kontext-max
Claude Opus 5 vs GPT Image 2.5 Sunburst
anthropic/claude-opus-5 · openai/gpt-image-2.5-sunburst
Claude Opus 5 vs FLUX.1 Kontext [Max]
anthropic/claude-opus-5 · black-forest-labs/flux-1-kontext-max
Glm-5.3 vs GPT Image 2.5 Sunburst
zai-org/glm-5.3 · openai/gpt-image-2.5-sunburst
Glm-5.3 vs FLUX.1 Kontext [Max]
zai-org/glm-5.3 · black-forest-labs/flux-1-kontext-max
Grok 4.6 vs GPT Image 2.5 Sunburst
xai/grok-4.6 · openai/gpt-image-2.5-sunburst
SWITCH BETWEEN THEM

One key, all 2, one line different.

from openai import OpenAI

client = OpenAI(
    base_url="https://api.aigateway.sh/v1",
    api_key="sk-aig-...",
)

# FLUX.1 Kontext [Max]
client.chat.completions.create(
    model="black-forest-labs/flux-1-kontext-max",
    messages=[{"role":"user","content":"hello"}],
)

# GPT Image 2.5 Sunburst
client.chat.completions.create(
    model="openai/gpt-image-2.5-sunburst",
    messages=[{"role":"user","content":"hello"}],
)
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