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Claude Opus 5 (Fast) vs Gemini 3.5 Flash Lite (batch)

Detailed technical comparison between Claude Opus 5 (Fast) (Anthropic) and Gemini 3.5 Flash Lite (batch) (Google). Review live API token pricing, context window capabilities, time-to-first-token latency, and verified benchmark scores side-by-side.

โšก Executive Summary & Verdict

Comparison Snapshot

Claude Opus 5 (Fast): 6 WinsvsGemini 3.5 Flash Lite (batch): 0 Wins
Context Leader

Gemini 3.5 Flash Lite (batch)

1,048,576 tokens
Agentic Tool-Calling

Tie

Equal Capability
Lowest Latency (TTFT)

Tie

Equal Speed
Input Price Leader

Gemini 3.5 Flash Lite (batch)

$0.15 / MTok
Anthropicactive

Claude Opus 5 (Fast)

Claude Opus 5 (Fast) is an advanced artificial intelligence model engineered by Anthropic. Tailored for complex multi-step reasoning, programming synthesis, and extended document comprehension, Claude Opus 5 (Fast) represents a key architectural iteration in the Anthropic model family. First released in 2026-07-24, it serves enterprise developers, research teams, and autonomous system architects requiring strict instruction compliance. Featuring an input capacity of 1,000,000 tokens (approximately 1,333 words), Claude Opus 5 (Fast) processes multi-file code repositories, lengthy technical reports, and complex prompts in a single inference call.

View Claude Opus 5 (Fast) Full Specs โ†’
Googleactive

Gemini 3.5 Flash Lite (batch)

Gemini 3.5 Flash Lite (batch) is an advanced artificial intelligence model engineered by Google. Tailored for complex multi-step reasoning, programming synthesis, and extended document comprehension, Gemini 3.5 Flash Lite (batch) represents a key architectural iteration in the Google model family. First released in 2026-07-21, it serves enterprise developers, research teams, and autonomous system architects requiring strict instruction compliance. Featuring an input capacity of 1,048,576 tokens (approximately 1,398 words), Gemini 3.5 Flash Lite (batch) processes multi-file code repositories, lengthy technical reports, and complex prompts in a single inference call.

View Gemini 3.5 Flash Lite (batch) Full Specs โ†’

Technical Specifications

๐Ÿ† = Superior Spec
SpecificationClaude Opus 5 (Fast)Gemini 3.5 Flash Lite (batch)
ProviderAnthropicGoogle
Context Window1,000,000 tokens1,048,576 tokens๐Ÿ†
Agent SuitabilityNot yet benchmarkedNot yet benchmarked
Time to First Token (TTFT)No public TTFT dataNo public TTFT data
Deployment Modelmanaged apimanaged api
Production StabilityBeta Access (est.)Beta Access (est.)
API AvailableYesYes
Released Date2026-07-242026-07-21

API Pricing Comparison

Input Price per Million Tokens

Claude Opus 5 (Fast)

$10.00

Gemini 3.5 Flash Lite (batch)

$0.15

Output Price per Million Tokens

Claude Opus 5 (Fast)

$50.00

Gemini 3.5 Flash Lite (batch)

$1.25

๐Ÿ’ก Cost Ratio: Gemini 3.5 Flash Lite (batch) is 66.7x cheaper per input token than Claude Opus 5 (Fast).

Want to test both models live?

Run side-by-side prompt benchmarks in our dynamic multi-model Sandbox. Compare execution speeds, latency metrics, and compute actual costs in real-time.

Benchmark Performance Metrics

Standardized Scores (0โ€“100%)

Scores show verified raw accuracy percentages across standardized AI evaluation suites. Higher bars indicate superior performance in that domain.

MMLUGeneral knowledge & multi-task understanding
81.0%vs72.8%+8.2% Claude Opus 5 (Fast)
Claude Opus 5 (Fast) ๐Ÿ†
Gemini 3.5 Flash Lite (batch)
HumanEvalPython coding & logic synthesis
79.2%vs69.0%+10.2% Claude Opus 5 (Fast)
Claude Opus 5 (Fast) ๐Ÿ†
Gemini 3.5 Flash Lite (batch)
MATHComplex mathematical problem solving
56.4%vs42.2%+14.2% Claude Opus 5 (Fast)
Claude Opus 5 (Fast) ๐Ÿ†
Gemini 3.5 Flash Lite (batch)
GPQAGraduate-level expert reasoning
38.4%vs29.6%+8.8% Claude Opus 5 (Fast)
Claude Opus 5 (Fast) ๐Ÿ†
Gemini 3.5 Flash Lite (batch)
HellaSwagCommonsense reasoning and inference
80.6%vs76.8%+3.8% Claude Opus 5 (Fast)
Claude Opus 5 (Fast) ๐Ÿ†
Gemini 3.5 Flash Lite (batch)
MT-BenchMulti-turn conversation flow quality
8.7%vs7.9%+0.7% Claude Opus 5 (Fast)
Claude Opus 5 (Fast) ๐Ÿ†
Gemini 3.5 Flash Lite (batch)

Claude Opus 5 (Fast) Quirks & Gotchas

No developer gotchas reported.

Gemini 3.5 Flash Lite (batch) Quirks & Gotchas

No developer gotchas reported.

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