Decision support

FLUX.2 Flex vs Kling Image O1

Compare canonical objects directly. The useful dimensions change with the object type, so model and hardware comparisons stay separate.

FLUX.2 Flex

Black Forest Labs

Sources:OpenRouter

Benchmark results

Head to head on 1 benchmark both models report

  • FLUX.2 Flex0leads
  • Kling Image O11lead
  • Arena Text to Image

    Arena rating · Higher is better

    • FLUX.2 Flex
      1156
      Arena #32CI 1153 to 1160
    • Kling Image O1
      Not reported
    Runs and sources
    FLUX.2 Flex
    • default115695% CI 1153 to 1160 · 153,015 votes
    Kling Image O1

    Not reported

  • Arena Image Edit

    Arena rating · Higher is better

    • FLUX.2 Flex
      1224
      Arena #46CI 1221 to 1228
    • Kling Image O1
      Best1250
      +26 ahead · Arena #39CI 1247 to 1254
    Runs and sources
    FLUX.2 Flex
    • default122495% CI 1221 to 1228 · 434,160 votes
    Kling Image O1
    • default125095% CI 1247 to 1254 · 140,278 votes

Each model's best published result is shown; "Not reported" means no matched evaluation, not a score of zero. Arena and DeepSWE ranks are the leaderboards' own; other ranks are among catalogue models with a score. Results from different harnesses or settings are not directly comparable.

Arena ratings: Arena (lmarena-ai/leaderboard-dataset), licensed CC BY 4.0. Ratings come from pairwise human votes and are only comparable within one leaderboard; the interval is Arena's 95% confidence interval. Model names are matched to the Vertical Tabs catalog.

Model specifications

Release date
November 25, 2025
December 1, 2025
Context window
67K
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Native context
—
—
Max output tokens
60,609
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Knowledge cutoff
—
—
Open weights
Closed
Closed
Parameter count
—
—

API pricing · USD per 1M tokens

Input
$0.00
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Output
$0.00
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Cached input
—
—
Cache write
—
—

Capabilities and modalities

Input modalities
text, image
text, image
Output modalities
image
image
Tool calling
—
—
Reasoning option
—
—
Supported options
seed
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Capabilities
—
—

Architecture and availability

Architecture
—
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Model families
—
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Tokenizer
Other
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Instruction format
—
—
License
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Proprietary
Providers
1
0
Provider endpoints
1
0
Ollama variants
0
0
Metadata source
ai-research
ai-research

A dash means the field is not reported. Provider-specific performance and pricing may differ.

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