Claude Opus 5 vs Claude Opus 5.5
| Signal | Claude Opus 5 | Delta | Claude Opus 5.5 |
|---|---|---|---|
Capabilities | 100 | -- | |
Pricing | 75 | -5 | |
Context window size | 95 | -- | |
Recency | 100 | -- | |
Output Capacity | 82 | -- | |
| Overall Result | 0 wins | of 5 | 1 wins |
Score History
95.1
current score
Tied
right now
95.1
current score
Claude Opus 5
Anthropic
Claude Opus 5.5
Anthropic
Claude Opus 5.5 saves you $350.00/month
That's $4200.00/year compared to Claude Opus 5 at your current usage level of 100K calls/month.
| Metric | Claude Opus 5 | Claude Opus 5.5 | Winner |
|---|---|---|---|
| Overall Score | 95 | 95 | -- |
| Rank | #6 | #5 | Claude Opus 5.5 |
| Quality Rank | #6 | #5 | Claude Opus 5.5 |
| Adoption Rank | #6 | #5 | Claude Opus 5.5 |
| Parameters | -- | -- | -- |
| Context Window | 1000K | 1000K | -- |
| Pricing | $5.00/$25.00/M | $4.00/$20.00/M | -- |
| Signal Scores | |||
| Capabilities | 100 | 100 | Claude Opus 5 |
| Pricing | 75 | 80 | Claude Opus 5.5 |
| Context window size | 95 | 95 | Claude Opus 5 |
| Recency | 100 | 100 | Claude Opus 5 |
| Output Capacity | 82 | 82 | Claude Opus 5 |
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 #6), placing it in the top 98% of all 290 models tracked.
Scores 95/100 (rank #5), placing it in the top 99% of all 290 models tracked.
With only a 0-point gap, these models are in the same performance tier. The practical difference in output quality is minimal - your choice should depend on pricing, latency requirements, and specific feature needs.
Choose Claude Opus 5 when you need:
- Step-by-step reasoning and chain-of-thought problem solving
Choose Claude Opus 5.5 when you need:
- Step-by-step reasoning and chain-of-thought problem solving
Claude Opus 5.5 offers 20% better value per quality point. At 1M tokens/day, you'd spend $360.00/month with Claude Opus 5.5 vs $450.00/month with Claude Opus 5 - a $90.00 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 5.5 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 ($20.00/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 and Claude Opus 5.5 are extremely close in overall performance (only 0 points apart). Your best choice depends entirely on which specific strengths matter most for your use case.
By Use Case
Best for Quality
Claude Opus 5
Marginally better benchmark scores; both are excellent
Best for Cost
Claude Opus 5.5
20% lower pricing; better value at scale
Best for Reliability
Claude Opus 5
Higher uptime and faster response speeds
Best for Prototyping
Claude Opus 5
Stronger community support and better developer experience
Best for Production
Claude Opus 5
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 | Claude Opus 5.5 |
|---|---|---|
| Vision (Image Input) | ||
| Function Calling | ||
| Streaming | ||
| JSON Mode | ||
| Reasoning | ||
| Web Search | ||
| Image Output |
Claude Opus 5
Anthropic
Claude Opus 5.5
Anthropic
Claude Opus 5.5 saves you $7.80/month
That's 20% cheaper than Claude Opus 5 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 | Claude Opus 5.5 |
|---|---|---|
| Context Window | 1M | 1M |
| Max Output Tokens | 128,000 | 128,000 |
| Open Source | No | No |
| Created | Jul 24, 2026 | Sep 22, 2026 |