Claude Opus 5 (Fast) vs o1
| Signal | Claude Opus 5 (Fast) | Delta | o1 |
|---|---|---|---|
Capabilities | 100 | -- | |
Pricing | 50 | +10 | |
Context window size | 95 | +11 | |
Recency | 100 | +76 | |
Output Capacity | 85 | +2 | |
Benchmarks | 0 | -76 | |
| Overall Result | 4 wins | of 6 | 1 wins |
Score History
95.1
current score
Claude Opus 5 (Fast)
right now
74.4
current score
Claude Opus 5 (Fast)
Anthropic
o1
OpenAI
Claude Opus 5 (Fast) saves you $1000.00/month
That's $12000.00/year compared to o1 at your current usage level of 100K calls/month.
| Metric | Claude Opus 5 (Fast) | o1 | Winner |
|---|---|---|---|
| Overall Score | 95 | 74 | Claude Opus 5 (Fast) |
| Rank | #3 | #129 | Claude Opus 5 (Fast) |
| Quality Rank | #3 | #129 | Claude Opus 5 (Fast) |
| Adoption Rank | #3 | #129 | Claude Opus 5 (Fast) |
| Parameters | -- | -- | -- |
| Context Window | 1000K | 200K | Claude Opus 5 (Fast) |
| Pricing | $10.00/$50.00/M | $15.00/$60.00/M | -- |
| Signal Scores | |||
| Capabilities | 100 | 100 | Claude Opus 5 (Fast) |
| Pricing | 50 | 40 | Claude Opus 5 (Fast) |
| Context window size | 95 | 84 | Claude Opus 5 (Fast) |
| Recency | 100 | 24 | Claude Opus 5 (Fast) |
| Output Capacity | 85 | 83 | Claude Opus 5 (Fast) |
| Benchmarks | -- | 77 | o1 |
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 #3), placing it in the top 99% of all 290 models tracked.
Scores 74/100 (rank #129), placing it in the top 56% of all 290 models tracked.
Claude Opus 5 (Fast) has a 21-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:
- Processing long documents or large codebases (1000K token context)
- Step-by-step reasoning and chain-of-thought problem solving
Choose o1 when you need:
- Step-by-step reasoning and chain-of-thought problem solving
Claude Opus 5 (Fast) offers 20% better value per quality point. At 1M tokens/day, you'd spend $900.00/month with Claude Opus 5 (Fast) vs $1125.00/month with o1 - a $225.00 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. Claude Opus 5 (Fast) also offers lower per-token costs for high-volume support
Long document analysis
Larger context window (1000K tokens) can process longer documents, contracts, and research papers in a single pass
Batch data extraction
Lower output pricing ($50.00/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 o1 with a significant 20.69999999999999-point lead. For most general use cases, Claude Opus 5 (Fast) is the stronger choice. However, o1 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
Claude Opus 5 (Fast)
20% 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 Cost - 20% lower pricing; better value at scale
- 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) | o1 |
|---|---|---|
| Vision (Image Input) | ||
| Function Calling | ||
| Streaming | ||
| JSON Mode | ||
| Reasoning | ||
| Web Search | ||
| Image Output |
Claude Opus 5 (Fast)
Anthropic
o1
OpenAI
Claude Opus 5 (Fast) saves you $21.00/month
That's 21% cheaper than o1 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) | o1 |
|---|---|---|
| Context Window | 1M | 200K |
| Max Output Tokens | 128,000 | 100,000 |
| Open Source | No | No |
| Created | Jul 24, 2026 | Dec 17, 2024 |