Claude Sonnet 5 vs GPT-5.5 Pro
| Signal | Claude Sonnet 5 | Delta | GPT-5.5 Pro |
|---|---|---|---|
Capabilities | 100 | -- | |
Pricing | 90 | +85 | |
Context window size | 95 | 0 | |
Recency | 100 | -- | |
Output Capacity | 85 | -- | |
Benchmarks | 0 | -92 | |
| Overall Result | 1 wins | of 6 | 2 wins |
Score History
85.2
current score
GPT-5.5 Pro
right now
92.7
current score
Claude Sonnet 5
Anthropic
GPT-5.5 Pro
OpenAI
Claude Sonnet 5 saves you $11300.00/month
That's $135600.00/year compared to GPT-5.5 Pro at your current usage level of 100K calls/month.
| Metric | Claude Sonnet 5 | GPT-5.5 Pro | Winner |
|---|---|---|---|
| Overall Score | 85 | 93 | GPT-5.5 Pro |
| Rank | #45 | #8 | GPT-5.5 Pro |
| Quality Rank | #45 | #8 | GPT-5.5 Pro |
| Adoption Rank | #45 | #8 | GPT-5.5 Pro |
| Parameters | -- | -- | -- |
| Context Window | 1000K | 1050K | GPT-5.5 Pro |
| Pricing | $2.00/$10.00/M | $30.00/$180.00/M | -- |
| Signal Scores | |||
| Capabilities | 100 | 100 | Claude Sonnet 5 |
| Pricing | 90 | 5 | Claude Sonnet 5 |
| Context window size | 95 | 96 | GPT-5.5 Pro |
| Recency | 100 | 100 | Claude Sonnet 5 |
| Output Capacity | 85 | 85 | Claude Sonnet 5 |
| Benchmarks | -- | 92 | GPT-5.5 Pro |
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 85/100 (rank #45), placing it in the top 85% of all 290 models tracked.
Scores 93/100 (rank #8), placing it in the top 98% of all 290 models tracked.
GPT-5.5 Pro has a 8-point advantage, which typically translates to noticeably better performance on complex reasoning, code generation, and multi-step tasks.
Choose Claude Sonnet 5 when you need:
- High-volume production workloads where API costs must be minimized
- Step-by-step reasoning and chain-of-thought problem solving
Choose GPT-5.5 Pro when you need:
- Step-by-step reasoning and chain-of-thought problem solving
Claude Sonnet 5 offers 94% better value per quality point. At 1M tokens/day, you'd spend $180.00/month with Claude Sonnet 5 vs $3150.00/month with GPT-5.5 Pro - a $2970.00 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 Sonnet 5 also offers lower per-token costs for high-volume support
Long document analysis
Larger context window (1050K tokens) can process longer documents, contracts, and research papers in a single pass
Batch data extraction
Lower output pricing ($10.00/M) reduces costs when processing thousands of records daily
Creative writing & content
Higher overall composite score (93/100) 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
GPT-5.5 Pro has a moderate advantage with a 7.5-point lead in composite score. It wins on more signal dimensions, but Claude Sonnet 5 has specific strengths that could make it the better choice for certain workflows.
By Use Case
Best for Quality
Claude Sonnet 5
Marginally better benchmark scores; both are excellent
Best for Cost
Claude Sonnet 5
94% lower pricing; better value at scale
Best for Reliability
Claude Sonnet 5
Higher uptime and faster response speeds
Best for Prototyping
Claude Sonnet 5
Stronger community support and better developer experience
Best for Production
Claude Sonnet 5
Wider enterprise adoption and proven at scale
by Anthropic
- Choose for Quality - Marginally better benchmark scores; both are excellent
- Choose for Cost - 94% 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 Sonnet 5 | GPT-5.5 Pro |
|---|---|---|
| Vision (Image Input) | ||
| Function Calling | ||
| Streaming | ||
| JSON Mode | ||
| Reasoning | ||
| Web Search | ||
| Image Output |
Claude Sonnet 5
Anthropic
GPT-5.5 Pro
OpenAI
Claude Sonnet 5 saves you $254.40/month
That's 94% cheaper than GPT-5.5 Pro 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 Sonnet 5 | GPT-5.5 Pro |
|---|---|---|
| Context Window | 1M | 1.1M |
| Max Output Tokens | 128,000 | 128,000 |
| Open Source | No | No |
| Created | Jun 30, 2026 | Apr 24, 2026 |