Gemini 3 Pro vs Gemini 1.5 Pro
Compare pricing, context windows, and strengths for Gemini 3 Pro by Google and Gemini 1.5 Pro by Google - and see how to put either to work in Appaca.
Gemini 3 Pro
Google's most intelligent multimodal model designed for advanced reasoning, coding, and agentic tasks.
View Gemini 3 ProGemini 1.5 Pro
A next-generation multimodal model with breakthrough long-context capability up to 1M tokens and strong reasoning across text, code, audio, video, and images.
View Gemini 1.5 ProGemini 3 Pro vs Gemini 1.5 Pro at a glance
Specs and pricing side by side, from the Appaca AI models directory.
| Spec | Gemini 3 Pro | Gemini 1.5 Pro |
|---|---|---|
| Provider | ||
| Model type | Text | Text |
| Context window | 1M tokens | 1M tokens |
| Input price | $4 / 1M tokens | $3.5 / 1M tokens |
| Output price | $18 / 1M tokens | $7 / 1M tokens |
| Status | Superseded by Gemini 3.1 Pro | Current |
How Gemini 3 Pro and Gemini 1.5 Pro differ
What the numbers mean in practice when choosing between Gemini 3 Pro and Gemini 1.5 Pro.
-
Gemini 1.5 Pro is 13% cheaper on input tokens ($3.5 vs $4 per million), which adds up quickly in document-heavy workloads.
-
Gemini 1.5 Pro is 61% cheaper on output tokens ($7 vs $18 per million) - the bigger factor for tools that generate long documents.
-
Both models offer the same 1M tokens context window.
-
Gemini 3 Pro has been superseded by Gemini 3.1 Pro - for new builds, consider the newer model first.
Strengths side by side
Where each model shines, according to benchmarks and provider positioning.
Gemini 3 Pro
1. State-of-the-art reasoning
- Top performance across academic reasoning, scientific knowledge, math, and complex problem-solving.
- Excels at long-horizon, multi-step workflows and deep logical interpretation.
2. World-leading multimodal capabilities
- Natively understands text, images, videos, audio, and code.
- Ranked highest on benchmarks like MMMU-Pro, Video-MMMU, ScreenSpot-Pro.
3. Exceptional coding + agentic workflows
- Strong in competitive coding and real-world agentic tasks (SWE-Bench Verified, Terminal-Bench, LiveCodeBench).
- Improved tool calling, planning, and execution for autonomous or semi-autonomous agents.
4. Powerful for long-context tasks
- Effective at 128K-1M context windows with high retrieval accuracy.
- Ideal for document-heavy workflows, research, analysis, multi-file coding, and multi-document reasoning.
5. Strong information synthesis and interpretation
- Outperforms peers in chart reasoning, OCR, structured extraction, and screen understanding.
- Excellent at combining multimodal inputs into coherent, concise answers.
6. High reliability for enterprise tasks
- Benchmarks show superior factuality, grounding, and parametric knowledge.
- Strong multilingual accuracy and global commonsense performance.
7. Optimized for production agents
- Designed for complex multi-step planning, simultaneous task execution, and improved consistency.
- Works across coding, research, creative workflows, UI generation, and data-heavy applications.
Gemini 1.5 Pro
1. Breakthrough long-context window up to 1,000,000 tokens
- Can process 1 hour of video, 11 hours of audio, 700k+ words, or 100k+ lines of code in a single prompt.
- Supports advanced retrieval, reasoning, summarization, and cross-document tasks.
- Achieves 99% retrieval accuracy on 1M-token Needle-In-A-Haystack tests.
2. Strong multimodal reasoning across video, audio, images, and text
- Can analyze long videos (e.g., full silent films), track events, infer causality, and identify small details.
- Handles large complex documents like manuals, transcripts, and books.
3. High-performance reasoning and problem solving
- Comparable to Gemini 1.0 Ultra across many benchmarks.
- Excels at code reasoning, multi-step explanations, and large-scale codebase analysis.
4. Advanced code understanding and generation
- Performs problem-solving on codebases exceeding 100,000 lines.
- Capable of cross-file reasoning, debugging guidance, API comprehension, and generating structured code improvements.
5. Efficient Mixture-of-Experts (MoE) architecture
- Activates only relevant expert pathways per input.
- Enables faster training, lower latency, and more efficient serving.
- Dramatically improves scalability and inference speed.
6. Exceptional in-context learning capabilities
- Learns new tasks directly from long prompts without fine-tuning.
- Demonstrated by learning to translate a low-resource language (Kalamang) from a grammar manual.
7. High-fidelity multimodal understanding
- Reads, analyzes, and reasons about long PDFs, code repositories, images, and videos together.
- Enables new classes of applications: legal analysis, scientific review, codebase audits, long-form content generation, etc.
8. Safety and reliability first
- Undergoes extensive ethics, safety testing, and red-teaming.
- Improved representational safety and reduced hallucinations compared to previous generations.
9. Available for developers and enterprises
- Accessible via AI Studio and Vertex AI.
- Supports future pricing tiers for expanded context windows.
- Designed for real enterprise-scale workloads.
10. Widely capable mid-size model
- Positioned between Gemini Pro and Gemini Ultra generations.
- Well-balanced: reasoning, multimodality, long-context, and speed.
Use Gemini 3 Pro or Gemini 1.5 Pro - or both
Appaca is the AI workspace for operators. Build internal tools and AI co-workers powered by Gemini 3 Pro or Gemini 1.5 Pro - connected to your real data and ready for your whole team. No code, no deployment.
Describe it, and it's built
Tell the Appaca agent the internal tool you need and it builds a working app powered by Gemini 3 Pro or Gemini 1.5 Pro. No code, no API keys, no deployment.
Switch models without rebuilding
Start on Gemini 3 Pro, test the same tool on Gemini 1.5 Pro, and keep whichever performs better - the rest of your app stays exactly as it is.
Automated for the whole team
Schedule tools to run on autopilot - daily digests, weekly reports, real-time triggers - and share them with your whole team from one workspace.
Describe it, and it's built
Tell the Appaca agent what your team needs and it builds a working app powered by Gemini 3 Pro or Gemini 1.5 Pro - connected to the tools you already use.







Related comparisons
See how Gemini 3 Pro and Gemini 1.5 Pro stack up against other models in the directory.
FAQs
Gemini 1.5 Pro is generally cheaper: $3.5 input / $7 output per million tokens, versus $4 / $18 for Gemini 3 Pro. Actual cost depends on how many tokens your workload reads and writes.
They are equal: both Gemini 3 Pro and Gemini 1.5 Pro support a 1M tokens context window.
It depends on the job. Compare the pricing, context window, and strengths above against your workload - and remember the choice isn't permanent. In Appaca you can build a tool on Gemini 3 Pro, test the same tool on Gemini 1.5 Pro, and switch at any time without rebuilding anything.
Yes. Appaca is a no-code AI workspace: describe the internal tool your team needs and the Appaca agent builds it as a working app powered by Gemini 3 Pro, Gemini 1.5 Pro, or any other model in the directory - with a built-in database, team access, and integrations. No API keys to wire up and nothing to deploy.
Build AI tools with Gemini 3 Pro or Gemini 1.5 Pro
Describe the tool your team needs and get a working app powered by the model you choose - with a built-in database, team access, and integrations. No code, no deployment.