Gemini 3.5 Flash vs Gemini 3 Flash
Google's latest Flash model vs its predecessor — Gemini 3 Flash is 67% cheaper on both input and output, with the same 1M context window.
Pricing data verified: Jun 21, 2026
| Specification | Gemini 3.5 Flash | Gemini 3 Flash |
|---|---|---|
| Input Price (per 1M tokens) | $1.50 | $0.50 |
| Output Price (per 1M tokens) | $9.00 | $3.00 |
| Context Window | 1M tokens | 1M tokens |
| Tier | Mid | Budget |
| Provider | ||
| Input Savings | Baseline | 67% cheaper |
| Output Savings | Baseline | 67% cheaper |
| Cost at 1M input + 500K output | $6.00 | $2.00 |
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Which Model for Which Use Case?
High-Volume Production
For chatbots, search augmentation, and API services handling thousands of daily requests, Gemini 3 Flash delivers solid quality at 33% of the cost. At 10K requests/day, you save $120/month vs Gemini 3.5 Flash.
Latest Model Quality
Gemini 3.5 Flash offers improved reasoning, better instruction following, and enhanced multimodal capabilities. When quality matters and the 3x price premium is justified, choose 3.5 Flash.
RAG & Search Pipelines
RAG pipelines process thousands of queries daily with heavy input tokens. Gemini 3 Flash's 1M context window and 67% lower cost make it ideal for knowledge-intensive retrieval tasks.
Enterprise Cost Optimization
At 1M requests/month, Gemini 3 Flash saves $4,800/year compared to Gemini 3.5 Flash. For enterprise deployments, the 67% cost difference translates to significant annual savings.
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Frequently Asked Questions
Is Gemini 3 Flash cheaper than Gemini 3.5 Flash?
Yes. Gemini 3 Flash costs $0.50/M input and $3.00/M output. Gemini 3.5 Flash costs $1.50/M input and $9.00/M output. Gemini 3 Flash is 67% cheaper on both input and output. For a typical workload of 1M input + 500K output tokens/month, Gemini 3 Flash costs $2.00 vs Gemini 3.5 Flash's $6.00 — saving $4.00/month (67%).
When should I choose Gemini 3.5 Flash over Gemini 3 Flash?
Choose Gemini 3.5 Flash when: (1) you need improved reasoning and instruction following, (2) your tasks benefit from the latest model capabilities, (3) the 3x price premium is justified by quality gains. Choose Gemini 3 Flash when: (1) you want 67% cost savings, (2) same 1M context window meets your needs, (3) your tasks don't require the latest model improvements.
Do Gemini 3.5 Flash and Gemini 3 Flash have the same context window?
Yes, both models offer a 1M token context window. The difference is in model quality and reasoning capability, not context size. Gemini 3.5 Flash offers improved instruction following and reasoning, while Gemini 3 Flash provides solid performance at 33% of the cost.
How much can I save by switching from Gemini 3.5 Flash to Gemini 3 Flash?
You save 67% on both input and output tokens. At 500 requests/day with 1,500 input and 800 output tokens each, Gemini 3.5 Flash costs $16.88/month vs Gemini 3 Flash's $5.63/month — saving $11.25/month ($135/year). For high-volume workloads, savings scale linearly.