Verified 2026 API Rates • Prompt Caching & Batch ROI

Gemini 1.5 Flash vs Mixtral 8x7B (32768)

Compare real-world API costs for Gemini 1.5 Flash ($0.075/$0.3) vs Mixtral 8x7B (32768) ($0.24/$0.24). Calculate Prompt Caching ROI & Batch API savings.

Gemini 1.5 Flash saves up to 69% on base input tokens

Google

Gemini 1.5 Flash

gemini-1.5-flash

Base Input Rate: $0.07 / 1M
Output Rate: $0.30 / 1M
Prompt Cache Read: $0.019 / 1M (-75%)
Cache Write Surcharge: $0.00 (Free write)
Batch API Discount: -50% Off
Context Window: 1,000k tokens
Quality Index (MMLU): 78.9

Inspect Full Specs →Connect API

Groq

Mixtral 8x7B (32768)

mixtral-8x7b

Base Input Rate: $0.24 / 1M
Output Rate: $0.24 / 1M
Prompt Cache Read: $0.12 / 1M (-50%)
Cache Write Surcharge: $0.00 (Free write)
Batch API Discount: -50% Off
Context Window: 32.768k tokens
Quality Index (MMLU): 78

Inspect Full Specs →Connect API

Differential Module 1

Prompt Caching ROI & Write Surcharge Break-Even Analysis

Prompt caching drastically reduces input token costs for static prefixes like system prompts, tool schemas, and document chunks. Compare caching mechanisms between Gemini 1.5 Flash and Mixtral 8x7B (32768):

Gemini 1.5 Flash Caching Profile-75% read discount

Cached Read Price: $0.019 per 1M tokens.
Write Surcharge: $0.00 (automatic caching with zero write penalty).
Minimum Cache Prefix: 1,024 tokens.
Amortization Rule: Immediate net savings from first cached read call.

Mixtral 8x7B (32768) Caching Profile-50% read discount

Cached Read Price: $0.120 per 1M tokens.
Write Surcharge: $0.00 (automatic caching with zero write penalty).
Minimum Cache Prefix: 1,024 tokens.
Amortization Rule: Immediate net savings from first cached read call.

Differential Module 2

Batch API 50% Discount Offload vs Real-Time SLA

Asynchronous Batch APIs cut total token expenditures in half (50% off input and output) in exchange for non-realtime execution (up to 24-hour turnaround SLA).

Model / Architecture	Standard Input / Output	Batch 50% Off Input / Output	Turnaround SLA	Optimal Use Cases
Gemini 1.5 Flash	$0.07 / $0.30	$0.04 / $0.15 (-50%)	24 Hours max (typically 30m - 2h)	Bulk evaluation, dataset labeling, background summarization
Mixtral 8x7B (32768)	$0.24 / $0.24	$0.12 / $0.12 (-50%)	24 Hours max (typically 30m - 2h)	Offline document translation, embedding backfills, test suites

Differential Module 3

Context Window Escalation & Tiered Pricing Architecture

Massive context windows allow ingesting entire repositories or books, but pricing models differ drastically between flat-rate vendors and tiered step-up pricing.

Gemini 1.5 Flash Context Capacity

Provides a 1,000k token context window with a maximum output limit of 8.192k tokens.⚠️ Note: Prompts exceeding 128k tokens double in price to $0.15/1M in and $0.6/1M out.

Mixtral 8x7B (32768) Context Capacity

Provides a 32.768k token context window with a maximum output limit of 32.768k tokens.✓ Flat-rate billing across all prompt sizes up to max context ceiling.

Quill Strategic Content

Real-World Production Scenarios: Monthly Spend Projections

Pre-computed monthly engineering bill projections across 3 representative enterprise application workloads:

Scenario 1

RAG Knowledge Base & Enterprise Search

100,000 queries/month, 3,500 input tokens (system + 5 retrieved chunks), 400 output tokens, 75% prompt cache hit rate.

Gemini 1.5 Flash:$23.48/mo

Mixtral 8x7B (32768):$62.10/mo

Delta Savings:-$38.62 (62%)

Architecture Verdict:Gemini 1.5 Flash delivers 62% lower monthly spend ($38.62/mo savings) for this workload profile.

Scenario 2

Multi-Turn Coding Agent & ReAct Loops

25,000 tasks/month, 8,000 input tokens (accumulating conversation context & tool schemas), 1,200 output tokens, 85% cache hit rate.

Gemini 1.5 Flash:$13.35/mo

Mixtral 8x7B (32768):$32.19/mo

Delta Savings:-$18.84 (59%)

Architecture Verdict:Gemini 1.5 Flash delivers 59% lower monthly spend ($18.84/mo savings) for this workload profile.

Scenario 3

High-Throughput Offline Data Extraction

500,000 records/month, 1,500 input tokens, 250 output tokens, 100% batch offload (24-hour turnaround SLA).

Gemini 1.5 Flash:$42.66/mo

Mixtral 8x7B (32768):$96.00/mo

Delta Savings:-$53.34 (56%)

Architecture Verdict:Gemini 1.5 Flash delivers 56% lower monthly spend ($53.34/mo savings) for this workload profile.

毫秒级实时交互模拟引擎

Gemini 1.5 Flash 对比 Mixtral 8x7B (32768)

针对企业典型三大工程落地形态（RAG 知识库、Coding Agent 多轮、离线批量清洗）进行精确成本演算：

Live 50ms Engine

月度请求量 (Requests)100,000

单次输入 Tokens (Input)4,000

单次输出 Tokens (Output)1,000

Prompt 缓存命中率 (Cache Hit)70%

Batch API 批处理分流比例0%

Gemini 1.5 Flash 更便宜

预计每月节省

Gemini 1.5 Flash$44.25$0.442// 千次请求

对比

Mixtral 8x7B (32768)$86.40$0.864// 千次请求

Developer FAQs

Frequently Asked Questions: Gemini 1.5 Flash vs Mixtral 8x7B (32768)

Authoritative answers on API rate limits, pricing math, break-even thresholds, and architectural migration.

1Which model is cheaper overall: Gemini 1.5 Flash or Mixtral 8x7B (32768)?

At base pricing, Gemini 1.5 Flash costs $0.075/1M input and $0.3/1M output, while Mixtral 8x7B (32768) costs $0.24/1M input and $0.24/1M output. The cheaper option depends on your input-to-output token ratio and whether prompt caching or batch discounts are utilized.

2How does Prompt Caching impact the cost of Gemini 1.5 Flash vs Mixtral 8x7B (32768)?

Gemini 1.5 Flash offers a 75% read discount ($0.01875/1M), whereas Mixtral 8x7B (32768) provides a 50% read discount ($0.12/1M). High cache hit ratios (>70%) significantly compress the cost delta in agentic and RAG architectures.

3Can I use Batch API with Gemini 1.5 Flash or Mixtral 8x7B (32768) to save 50%?

Gemini 1.5 Flash supports 50% batch offload discounts for asynchronous 24-hour turnaround tasks. Mixtral 8x7B (32768) supports 50% batch discounts.

4What are the context window limits and tiered pricing rules for Gemini 1.5 Flash vs Mixtral 8x7B (32768)?

Gemini 1.5 Flash features a 1,000k context window with tiered escalation above 128k tokens. In comparison, Mixtral 8x7B (32768) supports 32.768k tokens with flat per-token pricing.