Overview
GPT-5.4 Image 2 vs FLUX.2 Klein 4B: side-by-side summary
GPT-5.4 Image 2 and FLUX.2 Klein 4B are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.
GPT-5.4 Image 2, from OpenAI, has a 272,000-token context window and is priced at $8/M tokens input, $30/M tokens output on OpenRouter.
FLUX.2 Klein 4B, from black-forest-labs, has a 40,960-token context window and is priced at $0.014/megapixel on OpenRouter.
- Context window
- GPT-5.4 Image 2: 272,000 tokens
- FLUX.2 Klein 4B: 40,960 tokens
- Price
- GPT-5.4 Image 2: $8/M tokens input, $30/M tokens output
- FLUX.2 Klein 4B: $0.014/megapixel
- Provided by
- GPT-5.4 Image 2: OpenAI
- FLUX.2 Klein 4B: black-forest-labs