GPT-5.4 vs Gemini 2.5 Flash
Pricing, context window, and benchmark comparison · Last updated April 2026
Gemini 2.5 Flash is cheaper than GPT-5.4 at $0.30/1M/1M vs $2.50/1M/1M input tokens — a 8.3x cost difference. GPT-5.4 scores higher on quality benchmarks (ELO 1420). Choose Gemini 2.5 Flash for cost-sensitive workloads; choose GPT-5.4 for maximum quality.
Which is cheaper: GPT-5.4 or Gemini 2.5 Flash?
Gemini 2.5 Flash is the cheaper option at $0.30/1M per 1M input tokens, compared to $2.50/1M for GPT-5.4. That is a 8.3x cost difference on input tokens. Output pricing follows a similar pattern: GPT-5.4 charges $15.00/1M/1M vs $2.50/1M/1M for Gemini 2.5 Flash.
Which has better quality: GPT-5.4 or Gemini 2.5 Flash?
Based on LMSYS Chatbot Arena rankings, GPT-5.4 achieves a higher ELO score (1420 vs 1340), suggesting stronger performance on open-ended tasks. GPT-5.4 excels at openai flagship — top-tier reasoning, coding, and multimodal. Gemini 2.5 Flash is known for excellent price-performance at flash tier.
Which should you choose: GPT-5.4 or Gemini 2.5 Flash?
- → OpenAI flagship — top-tier reasoning, coding, and multimodal
- → Native computer use and tool search
- → 272K standard context (expandable to 1M)
- → Excellent price-performance at Flash tier
- → 1M token context window
- → Native multimodal
Frequently Asked Questions
Which is cheaper: GPT-5.4 or Gemini 2.5 Flash?
Gemini 2.5 Flash is cheaper at $0.30/1M per 1M input tokens, making it 8.3x more affordable.
Which has better quality: GPT-5.4 or Gemini 2.5 Flash?
GPT-5.4 scores higher on the LMSYS Chatbot Arena with an ELO of 1420, suggesting better overall quality for most tasks.
Which has a larger context window: GPT-5.4 or Gemini 2.5 Flash?
Gemini 2.5 Flash has a larger context window at 1000K tokens.
Should I choose GPT-5.4 or Gemini 2.5 Flash?
Choose Gemini 2.5 Flash if cost is the priority. Choose GPT-5.4 if benchmark quality is most important. Consider your specific use case: GPT-5.4 is best for coding and reasoning, while Gemini 2.5 Flash excels at fast-response and low-cost.
Is GPT-5.4 or Gemini 2.5 Flash open source?
GPT-5.4 is proprietary. Gemini 2.5 Flash is proprietary.