Claude Opus 5 (Fast) vs Gemini 3.5 Flash Lite
| Signal | Claude Opus 5 (Fast) | Delta | Gemini 3.5 Flash Lite |
|---|---|---|---|
Capabilities | 100 | -- | |
Pricing | 50 | -47 | |
Context window size | 95 | 0 | |
Recency | 100 | -- | |
Output Capacity | 85 | +5 | |
Benchmarks | 0 | -74 | |
| Overall Result | 1 wins | of 6 | 3 wins |
Score History
95.1
current score
Claude Opus 5 (Fast)
right now
76.9
current score
Claude Opus 5 (Fast)
Anthropic
Gemini 3.5 Flash Lite
Gemini 3.5 Flash Lite saves you $3345.00/month
That's $40140.00/year compared to Claude Opus 5 (Fast) at your current usage level of 100K calls/month.
| Metric | Claude Opus 5 (Fast) | Gemini 3.5 Flash Lite | Winner |
|---|---|---|---|
| Overall Score | 95 | 77 | Claude Opus 5 (Fast) |
| Rank | #2 | #80 | Claude Opus 5 (Fast) |
| Quality Rank | #2 | #80 | Claude Opus 5 (Fast) |
| Adoption Rank | #2 | #80 | Claude Opus 5 (Fast) |
| Parameters | -- | -- | -- |
| Context Window | 1000K | 1049K | Gemini 3.5 Flash Lite |
| Pricing | $10.00/$50.00/M | $0.30/$2.50/M | -- |
| Signal Scores | |||
| Capabilities | 100 | 100 | Claude Opus 5 (Fast) |
| Pricing | 50 | 98 | Gemini 3.5 Flash Lite |
| Context window size | 95 | 96 | Gemini 3.5 Flash Lite |
| Recency | 100 | 100 | Claude Opus 5 (Fast) |
| Output Capacity | 85 | 80 | Claude Opus 5 (Fast) |
| Benchmarks | -- | 75 | Gemini 3.5 Flash Lite |
Our score (0-100) is driven by benchmark performance (90%) from Arena Elo ratings, MMLU, GPQA, HumanEval, SWE-bench, and 15+ standardized evaluations. Capabilities and context window serve as tiebreakers (10%). Learn more about our methodology.
Scores 95/100 (rank #2), placing it in the top 100% of all 290 models tracked.
Scores 77/100 (rank #80), placing it in the top 73% of all 290 models tracked.
Claude Opus 5 (Fast) has a 18-point advantage, which typically translates to noticeably stronger performance on complex reasoning, code generation, and multi-step tasks.
Choose Claude Opus 5 (Fast) when you need:
- Step-by-step reasoning and chain-of-thought problem solving
Choose Gemini 3.5 Flash Lite when you need:
- High-volume production workloads where API costs must be minimized
- Step-by-step reasoning and chain-of-thought problem solving
Gemini 3.5 Flash Lite offers 95% better value per quality point. At 1M tokens/day, you'd spend $42.00/month with Gemini 3.5 Flash Lite vs $900.00/month with Claude Opus 5 (Fast) - a $858.00 monthly difference.
Both models have comparable response speeds. For most applications, the latency difference is negligible.
When latency matters most: Interactive chatbots, IDE code completion, real-time translation, and user-facing applications where response time directly impacts experience. For batch processing, background summarization, or offline analysis, latency is less critical.
Code generation & review
Based on overall model capabilities and architecture for coding tasks like generating functions, debugging, and refactoring
Customer support chatbot
Suitable for user-facing chat with competitive response times. Gemini 3.5 Flash Lite also offers lower per-token costs for high-volume support
Long document analysis
Larger context window (1049K tokens) can process longer documents, contracts, and research papers in a single pass
Batch data extraction
Lower output pricing ($2.50/M) reduces costs when processing thousands of records daily
Creative writing & content
Higher overall composite score (95/100) correlates with better nuance, coherence, and style in long-form content
Image understanding & OCR
Supports vision input - can analyze screenshots, diagrams, photos, and scanned documents directly
Claude Opus 5 (Fast) clearly outperforms Gemini 3.5 Flash Lite with a significant 18.19999999999999-point lead. For most general use cases, Claude Opus 5 (Fast) is the stronger choice. However, Gemini 3.5 Flash Lite may still excel in niche scenarios.
By Use Case
Best for Quality
Claude Opus 5 (Fast)
Marginally better benchmark scores; both are excellent
Best for Cost
Gemini 3.5 Flash Lite
95% lower pricing; better value at scale
Best for Reliability
Claude Opus 5 (Fast)
Higher uptime and faster response speeds
Best for Prototyping
Claude Opus 5 (Fast)
Stronger community support and better developer experience
Best for Production
Claude Opus 5 (Fast)
Wider enterprise adoption and proven at scale
by Anthropic
- Choose for Quality - Marginally better benchmark scores; both are excellent
- Choose for Reliability - Higher uptime and faster response speeds
- Choose for Prototyping - Stronger community support and better developer experience
- Choose for Production - Wider enterprise adoption and proven at scale
| Capability | Claude Opus 5 (Fast) | Gemini 3.5 Flash Lite |
|---|---|---|
| Vision (Image Input) | ||
| Function Calling | ||
| Streaming | ||
| JSON Mode | ||
| Reasoning | ||
| Web Search | ||
| Image Output |
Claude Opus 5 (Fast)
Anthropic
Gemini 3.5 Flash Lite
Gemini 3.5 Flash Lite saves you $74.46/month
That's 95% cheaper than Claude Opus 5 (Fast) at 1,000 tokens/request and 100 requests/day.
Assumes 60% input / 40% output token ratio per request. Actual costs may vary based on your usage pattern.
| Parameter | Claude Opus 5 (Fast) | Gemini 3.5 Flash Lite |
|---|---|---|
| Context Window | 1M | 1.0M |
| Max Output Tokens | 128,000 | 65,536 |
| Open Source | No | No |
| Created | Jul 24, 2026 | Jul 21, 2026 |