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Get started freeGemini 2.5 Flash vs GPT-5.4
Compare Gemini 2.5 Flash and GPT-5.4. Build AI products powered by either model on Appaca.
Model Comparison
| Feature | Gemini 2.5 Flash | GPT-5.4 |
|---|---|---|
| Provider | OpenAI | |
| Model Type | text | text |
| Context Window | 1,000,000 tokens | 1,050,000 tokens |
| Input Cost | $0.30/ 1M tokens | $2.50/ 1M tokens |
| Output Cost | $2.50/ 1M tokens | $15.00/ 1M tokens |
Stop choosing. Use both.
With Appaca you don't have to pick — build apps that are powered by Gemini 2.5 Flash, GPT-5.4, for your specific use case.
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New appStrengths & Best Use Cases
Gemini 2.5 Flash
Google1. Highly cost-efficient for large-scale workloads
- Extremely low input cost ($0.30/M) and affordable output cost.
- Built for production environments where throughput and budget matter.
- Significantly cheaper than competitors like o4-mini, Claude Sonnet, and Grok on text workloads.
2. Fast performance optimized for everyday tasks
- Ideal for summarization, chat, extraction, classification, captioning, and lightweight reasoning.
- Designed as a high-speed “workhorse model” for apps that require low latency.
3. Built-in “thinking budget” control
- Adjustable reasoning depth lets developers trade off latency vs. accuracy.
- Enables dynamic cost management for large agent systems.
4. Native multimodality across all major formats
- Inputs: text, images, video, audio, PDFs.
- Outputs: text + native audio synthesis (24 languages with the same voice).
- Great for conversational agents, voice interfaces, multimodal analysis, and captioning.
5. Industry-leading long context window
- 1,000,000 token context window.
- Supports long documents, multi-file processing, large datasets, and long multimedia sequences.
- Stronger MRCR long-context performance vs previous Flash models.
6. Native audio generation and multilingual conversation
- High-quality, expressive audio output with natural prosody.
- Style control for tones, accents, and emotional delivery.
- Noise-aware speech understanding for real-world conditions.
7. Strong benchmark performance for its cost
- 11% on Humanity's Last Exam (no tools) - competitive with Grok and Claude.
- 82.8% on GPQA diamond (science reasoning).
- 72.0% on AIME 2025 single-attempt math.
- Excellent multimodal reasoning (79.7% on MMMU).
- Leading long-context performance in its price tier.
8. Capable coding assistance
- 63.9% on LiveCodeBench (single attempt).
- 61.9%/56.7% on Aider Polyglot (whole/diff).
- Agentic coding support + tool use + function calling.
9. Fully supports tool integration
- Function calling.
- Structured outputs.
- Search-as-a-tool.
- Code execution (via Google Antigravity / Gemini API environments).
10. Production-ready availability
- Available in: Gemini App, Google AI Studio, Gemini API, Vertex AI, Live API.
- General availability (GA) with stable endpoints and documentation.
GPT-5.4
OpenAI1. Best Intelligence at Scale
- OpenAI positions GPT-5.4 as its frontier model for agentic, coding, and professional workflows.
- Built for complex professional work where stronger reasoning and higher answer quality matter.
2. Configurable Reasoning + Multimodal Input
- Supports configurable reasoning effort from none to xhigh, letting teams balance speed and depth.
- Accepts both text and image inputs while producing text output.
3. Massive Context for Long-Running Work
- 1.05M token context window supports very large codebases, documents, and multi-step workflows.
- Allows up to 128 k output tokens for long-form answers and larger generations.
4. Updated Knowledge & Broad Tool Support
- Knowledge cut-off of Aug 31 2025 keeps it current for newer frameworks and business context.
- Supports tools like web search, file search, code interpreter, hosted shell, computer use, and MCP in the Responses API.
Prompts to Get Started
Use these prompts to power AI products you build on Appaca. Each works great with the models above.
Best for Gemini 2.5 Flash
textLoad Testing Plan
Design a load testing plan for a service or API.
Resume Bullet Point Optimizer
Transform weak resume responsibilities into strong, results-oriented bullet points.
Airbnb Guest Review
Write an honest and helpful Airbnb or short-term rental review as a guest. Specific and fair to help future travelers.
Best for GPT-5.4
textAPI Versioning Strategy
Define an API versioning strategy for a product's public API.
History Timeline Activity
Create a timeline activity to help students understand historical sequence and causation.
Communication Audit
Audit your communication habits to reduce noise and increase impact.