Gemini 3.8 Flash vs Claude Fable 5.1 for 500K-Token Legal Browser Automation

Gemini 3.8 Flash vs Claude Fable 5.1
Complete Comparison: 500,000 input tokens × 2,000 output tokens
Comparison Mode
⚡ 50% Cached

Complete comparison of pricing, performance, and capabilities for 2 leading AI models with 50% Cached.

⚡ Caching Optimized (up to 90% savings)
Comparison Criteria Gemini 3.8 Flash
Google
Claude Fable 5.1
Anthropic
Calculation Results (Current Inputs) (50% cached)
Input Tokens 500,000 500,000
Output Tokens 2,000 2,000
Cost Breakdown
Input Cost $0.375000 (rounded ~ $0.38)Best $5.000000Worst
Output Cost $0.007500 (rounded ~ $0.01)Best $0.100000Worst
Unit Cost (Audio/OCR) $0.000000 $0.000000
Service Fees $0.000000 $0.000000
Total Cost $0.213750 (rounded ~ $0.21) Best Value $2.662500 (rounded ~ $2.66) Most Expensive
Processing Time 26 minutes, 20.00 seconds Fastest 42 minutes, 37.99 seconds Slowest
Tokens per Second 340Fastest 210Slowest
Time to First Token 105ms Best 430ms Worst
Cost per 1K tokens $0.000426Best $0.005304 (rounded ~ $0.01)Worst
Tokens per Dollar 2,348,538Best Value 188,545Worst Value
Cost per 1 Million Tokens (Informational)
Input Cost / 1M (Base) $0.750000Best $10.000000Worst
Output Cost / 1M (Base) $3.750000Best $50.000000Worst
Input Cost / 1M (Optimized) $0.750000Best
Optimizations: No optimizations applied
$10.000000Worst
Optimizations: No optimizations applied
Output Cost / 1M (Optimized) $3.750000Best
Optimizations: No optimizations applied
$50.000000Worst
Optimizations: No optimizations applied
Capabilities & Advanced Features
Images Support ✓ Supported ✓ Supported
Video Support ✓ Supported ✗ Not Supported
Audio Support ✓ Supported ✗ Not Supported
Caching Support
50
✓ Supported ✓ Supported
Batch API Support ✓ Supported ✓ Supported
Tool Usage Support ✓ Supported ✓ Supported
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Select AI Model

Gemini 3.8 Flash
GoogleMax Context: 1,048,576 tokens
$0.75 / $3.75 per 1M tokens
Use Batch API (50% discount)
50%
Provider-specific multipliers applied after all calculations
Enable for cache discounts
Select platform to enforce context limits
Number of requests (max 1M). Summary view auto-enabled >10k.

Calculate Token Costs

$0.187500 Input Cost
$0.007500 Output Cost
$0.000000 Unit Cost
$0.000000 Search Cost
$0.000000 Request Fee
$0.000000 Tool Fee
$0.000000 Code Execution
502,000Total Tokens
$0.000426Cost per 1K
2,348,538Tokens per $
📊 Advanced Cost Breakdown

Processing Speed

26m 20s Processing Time
340 Tokens/Second
105ms Time to First Token
318 Effective Speed

Model Comparison

Select a model to see comparisons with competitors.

Model Information

Select a model to see detailed information.

🔄 Advanced Options

⚡ Optimization
Flat fee per session (e.g., $0.03 for Code Interpreter)
Hourly storage fee for cached data
First 50 hours free, $0.05/hour after

🧠 Reasoning & Thinking
Manual thinking tokens (billed at output rate)

🔧 Special Modes
Enable 6.0x Fast Mode multiplier

📚 Research & Citations
Enable $1.00/$4.00 rates + $10.00/1k search
Enable research tier pricing
Fee per source cited

🎤 Realtime Audio & Video
Session length for billing
📊 Multiple Models Detected: This page contains data for 2 models. See the detailed comparison table above, and switch between models using tabs below.

Gemini 3.8 Flash Google 1048576

$0.213750 (rounded ~ $0.21)
Total Cost
⚡ 50% Cached 🔧 Tools
👁️
Vision/Images
✓ Available
🎧
Audio Processing
✓ Available
🎥
Video Analysis
✓ Available
🔧
Tool Usage
✓ Available
📄
OCR Support
✗ Not Available
📊
Batch API
✓ Available
Caching
✓ Available
90% savings

💰 Total Cost Calculation (from Plugin)

Base Cost (No Optimizations) $0.382500 (rounded ~ $0.38) Input: $0.375000 (rounded ~ $0.38)
Output: $0.007500 (rounded ~ $0.01)
Optimized Cost $0.213750 (rounded ~ $0.21) Input: $0.375000 (rounded ~ $0.38)
Output: $0.007500 (rounded ~ $0.01)
Unit: $0.000000
Fees: $0.000000
Total Savings $0.168750 (rounded ~ $0.17) 44.1% discount

Detailed Cost Analysis (from Plugin)

For 500,000 input tokens and 2,000 output tokens:

  • Input Cost: $0.375000 (rounded ~ $0.38)
  • Output Cost: $0.007500 (rounded ~ $0.01)
  • Total Cost: $0.213750 (rounded ~ $0.21)
  • Cost per 1K tokens: $0.000426
  • Tokens per dollar: 2,348,538 tokens
  • Context Window: 1048576 tokens

Speed & Performance Analysis

With a processing speed of 340 tokens per second and 105ms time to first token:

  • Processing Time: 26 minutes, 20.00 seconds
  • Latency: 105 milliseconds to first token
  • Base Throughput: 340 tokens/second
  • Effective Throughput: 318 tokens/second (temperature-adjusted)

Best Use Cases

Choose Gemini 3.8 Flash for high-speedmulti-modal web navigation and data retrieval; use Claude Fable 5.1 for complexlogic-heavy legal reasoning and accurate document extraction.

Want this applied to YOUR actual stack?

This calculator shows the math for Gemini 3.8 Flash. Your decision needs more — current infrastructure, compliance requirements, actual workload patterns, volume tiers — that change which model is right for you.

Get a $39 personalized AI Architecture Audit. PDF tailored to your stack, delivered in under 60 seconds. 7-day no-questions-asked refund.

Get my instant AI audit — $39 →

Claude Fable 5.1 Anthropic 1000000

$2.662500 (rounded ~ $2.66)
Total Cost
⚡ 50% Cached 🔧 Tools
👁️
Vision/Images
✓ Available
🎧
Audio Processing
✗ Not Available
🎥
Video Analysis
✗ Not Available
🔧
Tool Usage
✓ Available
📄
OCR Support
✗ Not Available
📊
Batch API
✓ Available
Caching
✓ Available
90% savings

💰 Total Cost Calculation (from Plugin)

Base Cost (No Optimizations) $5.100000 Input: $5.000000
Output: $0.100000
Optimized Cost $2.662500 (rounded ~ $2.66) Input: $5.000000
Output: $0.100000
Unit: $0.000000
Fees: $0.000000
Total Savings $2.437500 (rounded ~ $2.44) 47.8% discount

Detailed Cost Analysis (from Plugin)

For 500,000 input tokens and 2,000 output tokens:

  • Input Cost: $5.000000
  • Output Cost: $0.100000
  • Total Cost: $2.662500 (rounded ~ $2.66)
  • Cost per 1K tokens: $0.005304 (rounded ~ $0.01)
  • Tokens per dollar: 188,545 tokens
  • Context Window: 1000000 tokens

Speed & Performance Analysis

With a processing speed of 210 tokens per second and 430ms time to first token:

  • Processing Time: 42 minutes, 37.99 seconds
  • Latency: 430 milliseconds to first token
  • Base Throughput: 210 tokens/second
  • Effective Throughput: 196 tokens/second (temperature-adjusted)

Best Use Cases

Choose Gemini 3.8 Flash for high-speedmulti-modal web navigation and data retrieval; use Claude Fable 5.1 for complexlogic-heavy legal reasoning and accurate document extraction.

Want this applied to YOUR actual stack?

This calculator shows the math for Claude Fable 5.1. Your decision needs more — current infrastructure, compliance requirements, actual workload patterns, volume tiers — that change which model is right for you.

Get a $39 personalized AI Architecture Audit. PDF tailored to your stack, delivered in under 60 seconds. 7-day no-questions-asked refund.

Get my instant AI audit — $39 →

✨ Market Recommendations AI Model Registry

← Back to Gemini 3.8 Flash
📋 Active Input Parameters
Input Tokens: 500,000
Output Tokens: 2,000
Cached Tokens: 50%
Tools: Enabled
Rank AI Model & Provider Total Cost vs Gemini 3.8 Flash vs Claude Fable 5.1
🏆 Gemini 3.1 Flash Lite
Google
$0.071750 (rounded ~ $0.07) Best Value ↓ 66.4% cheaper ↓ 97.3% cheaper
🥈 Gemini 3.5 Flash-Lite
Google
$0.087500 (rounded ~ $0.09) ↓ 59.1% cheaper ↓ 96.7% cheaper
🥉 Gemini 2.5 Flash
Google
$0.087500 (rounded ~ $0.09) ↓ 59.1% cheaper ↓ 96.7% cheaper
#4 Gemini 3.1 Flash
Google
$0.287000 (rounded ~ $0.29) ↑ 34.3% more ↓ 89.2% cheaper
#5 GPT-5.6 Luna
OpenAI
$0.287000 (rounded ~ $0.29) ↑ 34.3% more ↓ 89.2% cheaper
#6 Gemini 3.6 Flash
Google
$0.427500 (rounded ~ $0.43) ↑ 100% more ↓ 83.9% cheaper
#7 Gemini 3.5 Flash
Google
$0.430500 ↑ 101.4% more ↓ 83.8% cheaper
#8 Claude Sonnet 5
Anthropic
$0.570000 ↑ 166.7% more ↓ 78.6% cheaper
#9 Grok 4.3
xAI
$0.697500 (rounded ~ $0.70) ↑ 226.3% more ↓ 73.8% cheaper
#10 Grok 4.20 Beta
xAI
$0.697500 (rounded ~ $0.70) ↑ 226.3% more ↓ 73.8% cheaper
#11 Gemini 2.5 Pro
Google
$0.717500 (rounded ~ $0.72) ↑ 235.7% more ↓ 73.1% cheaper
#12 GPT-5.6 Terra
OpenAI
$0.717500 (rounded ~ $0.72) ↑ 235.7% more ↓ 73.1% cheaper
#13 Claude Sonnet 4.6
Anthropic
$0.855000 (rounded ~ $0.86) ↑ 300% more ↓ 67.9% cheaper
#14 Gemini 3.1 Pro
Google
$1.136000 (rounded ~ $1.14) ↑ 431.5% more ↓ 57.3% cheaper
#15 GPT-5.4
OpenAI
$1.420000 ↑ 564.3% more ↓ 46.7% cheaper
#16 GPT-5.4 Thinking
OpenAI
$1.420000 ↑ 564.3% more ↓ 46.7% cheaper
#17 Claude Opus 4.7
Anthropic
$1.425000 (rounded ~ $1.43) ↑ 566.7% more ↓ 46.5% cheaper
#18 Claude Opus 5
Anthropic
$1.425000 (rounded ~ $1.43) ↑ 566.7% more ↓ 46.5% cheaper
#19 Claude Opus 4.8
Anthropic
$1.425000 (rounded ~ $1.43) ↑ 566.7% more ↓ 46.5% cheaper
#20 Claude Opus 4.6
Anthropic
$1.425000 (rounded ~ $1.43) ↑ 566.7% more ↓ 46.5% cheaper
#21 GPT-5.6 Sol
OpenAI
$1.435000 (rounded ~ $1.44) ↑ 571.3% more ↓ 46.1% cheaper
#22 Claude Fable 5.1
Anthropic
$2.662500 (rounded ~ $2.66) ↑ 1145.6% more Same price
#23 Claude Mythos 5.1
Anthropic
$2.662500 (rounded ~ $2.66) ↑ 1145.6% more Same price
#24 GPT-5.5
OpenAI
$2.840000 ↑ 1228.7% more ↑ 6.7% more
#25 Claude Fable 5
Anthropic
$2.850000 ↑ 1233.3% more ↑ 7% more
#26 Claude Mythos 5
Anthropic
$2.850000 ↑ 1233.3% more ↑ 7% more
#27 GPT-6 Astra
OpenAI
$5.700000 ↑ 2566.7% more ↑ 114.1% more
#28 GPT-6 Astra
OpenAI
$5.700000 ↑ 2566.7% more ↑ 114.1% more
🏆

Gemini 3.1 Flash Lite
Google

$0.071750 (rounded ~ $0.07)
vs Gemini 3.8 Flash: ↓ 66.4%
vs Claude Fable 5.1: ↓ 97.3%
🥈

Gemini 3.5 Flash-Lite
Google

$0.087500 (rounded ~ $0.09)
vs Gemini 3.8 Flash: ↓ 59.1%
vs Claude Fable 5.1: ↓ 96.7%
🥉

Gemini 2.5 Flash
Google

$0.087500 (rounded ~ $0.09)
vs Gemini 3.8 Flash: ↓ 59.1%
vs Claude Fable 5.1: ↓ 96.7%
#4

Gemini 3.1 Flash
Google

$0.287000 (rounded ~ $0.29)
vs Gemini 3.8 Flash: ↑ 34.3%
vs Claude Fable 5.1: ↓ 89.2%
#5

GPT-5.6 Luna
OpenAI

$0.287000 (rounded ~ $0.29)
vs Gemini 3.8 Flash: ↑ 34.3%
vs Claude Fable 5.1: ↓ 89.2%
#6

Gemini 3.6 Flash
Google

$0.427500 (rounded ~ $0.43)
vs Gemini 3.8 Flash: ↑ 100%
vs Claude Fable 5.1: ↓ 83.9%
#7

Gemini 3.5 Flash
Google

$0.430500
vs Gemini 3.8 Flash: ↑ 101.4%
vs Claude Fable 5.1: ↓ 83.8%
#8

Claude Sonnet 5
Anthropic

$0.570000
vs Gemini 3.8 Flash: ↑ 166.7%
vs Claude Fable 5.1: ↓ 78.6%
#9

Grok 4.3
xAI

$0.697500 (rounded ~ $0.70)
vs Gemini 3.8 Flash: ↑ 226.3%
vs Claude Fable 5.1: ↓ 73.8%
#10

Grok 4.20 Beta
xAI

$0.697500 (rounded ~ $0.70)
vs Gemini 3.8 Flash: ↑ 226.3%
vs Claude Fable 5.1: ↓ 73.8%
#11

Gemini 2.5 Pro
Google

$0.717500 (rounded ~ $0.72)
vs Gemini 3.8 Flash: ↑ 235.7%
vs Claude Fable 5.1: ↓ 73.1%
#12

GPT-5.6 Terra
OpenAI

$0.717500 (rounded ~ $0.72)
vs Gemini 3.8 Flash: ↑ 235.7%
vs Claude Fable 5.1: ↓ 73.1%
#13

Claude Sonnet 4.6
Anthropic

$0.855000 (rounded ~ $0.86)
vs Gemini 3.8 Flash: ↑ 300%
vs Claude Fable 5.1: ↓ 67.9%
#14

Gemini 3.1 Pro
Google

$1.136000 (rounded ~ $1.14)
vs Gemini 3.8 Flash: ↑ 431.5%
vs Claude Fable 5.1: ↓ 57.3%
#15

GPT-5.4
OpenAI

$1.420000
vs Gemini 3.8 Flash: ↑ 564.3%
vs Claude Fable 5.1: ↓ 46.7%
#16

GPT-5.4 Thinking
OpenAI

$1.420000
vs Gemini 3.8 Flash: ↑ 564.3%
vs Claude Fable 5.1: ↓ 46.7%
#17

Claude Opus 4.7
Anthropic

$1.425000 (rounded ~ $1.43)
vs Gemini 3.8 Flash: ↑ 566.7%
vs Claude Fable 5.1: ↓ 46.5%
#18

Claude Opus 5
Anthropic

$1.425000 (rounded ~ $1.43)
vs Gemini 3.8 Flash: ↑ 566.7%
vs Claude Fable 5.1: ↓ 46.5%
#19

Claude Opus 4.8
Anthropic

$1.425000 (rounded ~ $1.43)
vs Gemini 3.8 Flash: ↑ 566.7%
vs Claude Fable 5.1: ↓ 46.5%
#20

Claude Opus 4.6
Anthropic

$1.425000 (rounded ~ $1.43)
vs Gemini 3.8 Flash: ↑ 566.7%
vs Claude Fable 5.1: ↓ 46.5%
#21

GPT-5.6 Sol
OpenAI

$1.435000 (rounded ~ $1.44)
vs Gemini 3.8 Flash: ↑ 571.3%
vs Claude Fable 5.1: ↓ 46.1%
#22

Claude Fable 5.1
Anthropic

$2.662500 (rounded ~ $2.66)
vs Gemini 3.8 Flash: ↑ 1145.6%
vs Claude Fable 5.1: Same
#23

Claude Mythos 5.1
Anthropic

$2.662500 (rounded ~ $2.66)
vs Gemini 3.8 Flash: ↑ 1145.6%
vs Claude Fable 5.1: Same
#24

GPT-5.5
OpenAI

$2.840000
vs Gemini 3.8 Flash: ↑ 1228.7%
vs Claude Fable 5.1: ↑ 6.7%
#25

Claude Fable 5
Anthropic

$2.850000
vs Gemini 3.8 Flash: ↑ 1233.3%
vs Claude Fable 5.1: ↑ 7%
#26

Claude Mythos 5
Anthropic

$2.850000
vs Gemini 3.8 Flash: ↑ 1233.3%
vs Claude Fable 5.1: ↑ 7%
#27

GPT-6 Astra
OpenAI

$5.700000
vs Gemini 3.8 Flash: ↑ 2566.7%
vs Claude Fable 5.1: ↑ 114.1%
#28

GPT-6 Astra
OpenAI

$5.700000
vs Gemini 3.8 Flash: ↑ 2566.7%
vs Claude Fable 5.1: ↑ 114.1%
✨ How recommendations work (v8.6.0): We scan all active models in the registry and only include those that support ALL your current inputs. For token-based models, we check if they can handle your token counts. For special pricing models (OCR, video, audio), we verify they have the correct pricing structure. Features marked requested were in your inputs but not supported by that model. Now using official provider pricing without reseller markups.

Optimizing Agentic Workflows for Legal Research

Legal tech teams managing autonomous browser agents for tasks like due diligence or e-discovery require models that can reliably handle tool calling alongside complex document analysis. When processing 500,000 tokens per agentic session, selecting the right model often comes down to balancing raw throughput and reasoning reliability.

Gemini 3.8 Flash stands out for agentic browser automation where speed and multi-modal integration are critical. Its ability to navigate live web environments and rapidly synthesize visual information makes it a strong candidate for broad research queries where the agent must evaluate multiple page elements simultaneously. The model is optimized for high-volume tasks, allowing for efficient execution of 20-50 tool calls without significant latency bottlenecks.

Conversely, Claude Fable 5.1 excels in scenarios requiring deeper, nuanced reasoning. In legal contexts, an agent must often distinguish between relevant and irrelevant information across dense, regulatory-heavy websites. If your browser automation pipeline prioritizes high-accuracy extraction or requires complex multi-step decision-making where logic errors are costly, this model provides a more robust reasoning architecture.

For engineering teams, the choice rests on the specific nature of your browser agents. If the workload is primarily data retrieval and summarization, leverage the performance efficiencies of Gemini. If the objective is precise, high-stakes analysis where the agent must perform sophisticated logic checks on every web-sourced finding, prioritize the reasoning depth of the Claude family. Both models are capable of managing long-context inputs, ensuring consistent performance during protracted research sessions.

Frequently Asked Questions

How accurate are these AI model cost calculations?
Our calculations are based on official pricing from each provider (Google, OpenAI, Anthropic, Meta, xAI, Perplexity, DeepSeek, Mistral) and are updated regularly. We account for all factors including multimodal inputs, caching discounts, batch API pricing, tool usage multipliers, OCR processing, audio minutes, silence fees, and research mode pricing. Note: Reseller markups and dedicated instance multipliers have been removed to reflect official provider pricing.
How does prompt caching work?
Caching discounts vary by provider: Google and OpenAI offer 90% discounts on cached input tokens. Anthropic uses write (1.25x) and read (0.10x) multipliers. Savings are applied to the token portion only, not unit-based fees.
How do Market Recommendations work (v8.6.0)?
Our recommendation engine scans the entire model registry and only includes models that support ALL your current input parameters (tokens, images, video, audio, OCR, tools, batch API, etc.). It calculates exact costs with your settings and sorts by price, showing you the best value options that can handle your complete workflow. Special pricing models (OCR, video, audio, image generation) are properly handled and only appear when their specific input types are requested. v8.6.0 removes reseller markups (20% buffer) and dedicated instance multipliers to reflect official provider pricing.
What is the YemHub AI Calculator Tool?
The YemHub AI Calculator is the most comprehensive tool for estimating costs and comparing performance metrics across 50+ AI models. It calculates token-based pricing, analyzes multimodal processing, accounts for state-dependent pricing (context cliffs, tiered tunnels), provides optimization recommendations, and now offers intelligent market matching to find the best alternatives for your specific needs.