gemini-1.5-flash · Google
Lightweight, cost-efficient legacy model with 1M context window and native multimodal support.
Last checked Aug 28, 2026. Calculations use the listed base rates; provider-specific tiers, cache writes, batch pricing, and long-context rules may differ. Confirm the current rate at the official provider source.
Quick answer
At the published base rate, Gemini 1.5 Flash costs $0.075 per 1M input tokens and $0.30 per 1M output tokens. It supports a 1M context window and is currently marked legacy.
Method & trust
This rate card uses the provider's listed base input, output, and cached-input prices. Workload tables below apply those rates to explicit token counts, cache assumptions, and request volumes; verify provider-specific tiers before committing budget.
Input
$0.075
per 1M tokens
Output
$0.30
per 1M tokens
Cached input
$0.0188
per 1M tokens
Context window
1M
max output 8.2K
Gemini 1.5 Flash cost calculator
What Gemini 1.5 Flash costs per task
| Use case | Input tokens | Output tokens | Cost / request | Monthly @ 1K req/day |
|---|---|---|---|---|
| Customer support chatbot | 3,500 | 350 | $0.00023 | $6.891 |
| RAG / search-augmented answers | 8,000 | 500 | $0.000525 | $15.75 |
| AI coding assistant | 12,000 | 2,000 | $0.001095 | $32.85 |
| Document summarization | 25,000 | 600 | $0.001914 | $57.431 |
| Agentic workflow | 40,000 | 1,500 | $0.001987 | $59.625 |
| Content generation | 800 | 1,200 | $0.000406 | $12.195 |
| Data extraction & tagging | 2,000 | 250 | $0.000203 | $6.075 |
| Translation | 5,000 | 5,500 | $0.001983 | $59.484 |
Assumes each use case's typical cacheable share of input. See full cost scenarios.
Compare with alternatives
| Model | Input /M | Output /M | Context | Chat request* |
|---|---|---|---|---|
| Gemini 1.5 Flash | $0.075 | $0.30 | 1M | $0.000428 |
| GPT-5.6 Solcompare | $5.00 | $30.00 | 1.1M | $0.035 |
| GPT-5.6 Terracompare | $2.00 | $12.00 | 1.1M | $0.014 |
| GPT-5.6 Lunacompare | $0.20 | $1.20 | 1.1M | $0.0014 |
| GPT-5.6 Cybercompare | $12.50 | $75.00 | 1.1M | $0.0875 |
| GPT-5.5 Standardcompare | $5.00 | $30.00 | 512K | $0.035 |
| GPT-5.5 Procompare | $30.00 | $180.00 | 512K | $0.21 |
| GPT-5.4 Workhorsecompare | $2.50 | $15.00 | 256K | $0.0175 |
| GPT-5.4 minicompare | $0.75 | $4.50 | 256K | $0.00525 |
*4,000 in + 800 out tokens, 50% cached input where available.
Related calculations
FAQ
Gemini 1.5 Flash costs $0.075 per 1M input tokens and $0.30 per 1M output tokens, with cached input at $0.0188 per 1M tokens. Verified Aug 28, 2026 against https://ai.google.dev/gemini-api/docs/pricing.
Gemini 1.5 Flash supports a 1,048,576-token context window with up to 8,192 output tokens per request, tokenized with sentencepiece.
At $0.075/M input and $0.30/M output, Gemini 1.5 Flash sits below GPT-5.6 Sol ($5.00/M in, $30.00/M out) — see the comparison table for full-workload differences.