FLUX.2 Flex vs Gemini 2.5 Flash Preview 09-2025: side-by-side summary

FLUX.2 Flex and Gemini 2.5 Flash Preview 09-2025 are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.

FLUX.2 Flex, from black-forest-labs, has a 67,344-token context window and is priced from $0.06/megapixel on OpenRouter.

Gemini 2.5 Flash Preview 09-2025, from Google, has a 1,048,576-token context window and is priced by the provider serving it on OpenRouter.

Context window

• FLUX.2 Flex: 67,344 tokens
• Gemini 2.5 Flash Preview 09-2025: 1,048,576 tokens

Price

• FLUX.2 Flex: from $0.06/megapixel
• Gemini 2.5 Flash Preview 09-2025: Pricing varies by provider

Provided by

• FLUX.2 Flex: black-forest-labs
• Gemini 2.5 Flash Preview 09-2025: Google

• FLUX.2 Flex model details, providers and pricing
• Gemini 2.5 Flash Preview 09-2025 model details, providers and pricing