Claude Fable 5 vs GPT-5.5 Pro
| Signal | Claude Fable 5 | Delta | GPT-5.5 Pro |
|---|---|---|---|
Capabilities | 100 | -- | |
Benchmarks | 96 | +5 | |
Pricing | 50 | +45 | |
Context window size | 86 | 0 | |
Recency | 100 | -- | |
Output Capacity | 85 | -- | |
| Overall Result | 2 wins | of 6 | 1 wins |
Score History
96.6
current score
Claude Fable 5
right now
92.2
current score
Claude Fable 5
Anthropic
GPT-5.5 Pro
OpenAI
Claude Fable 5 saves you $8500.00/month
That's $102000.00/year compared to GPT-5.5 Pro at your current usage level of 100K calls/month.
| Metric | Claude Fable 5 | GPT-5.5 Pro | Winner |
|---|---|---|---|
| Overall Score | 97 | 92 | Claude Fable 5 |
| Rank | #1 | #6 | Claude Fable 5 |
| Quality Rank | #1 | #6 | Claude Fable 5 |
| Adoption Rank | #1 | #6 | Claude Fable 5 |
| Parameters | -- | -- | -- |
| Context Window | 1000K | 1050K | GPT-5.5 Pro |
| Pricing | $10.00/$50.00/M | $30.00/$180.00/M | -- |
| Signal Scores | |||
| Capabilities | 100 | 100 | Claude Fable 5 |
| Benchmarks | 96 | 92 | Claude Fable 5 |
| Pricing | 50 | 5 | Claude Fable 5 |
| Context window size | 86 | 86 | GPT-5.5 Pro |
| Recency | 100 | 100 | Claude Fable 5 |
| Output Capacity | 85 | 85 | Claude Fable 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 97/100 (rank #1), placing it in the top 100% of all 290 models tracked.
Scores 92/100 (rank #6), placing it in the top 98% of all 290 models tracked.
With only a 4-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 Fable 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 Fable 5 offers 71% better value per quality point. At 1M tokens/day, you'd spend $900.00/month with Claude Fable 5 vs $3150.00/month with GPT-5.5 Pro - a $2250.00 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 Fable 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 ($50.00/M) reduces costs when processing thousands of records daily
Creative writing & content
Higher overall composite score (97/100) 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 Fable 5 has a moderate advantage with a 4.3999999999999915-point lead in composite score. It wins on more signal dimensions, but GPT-5.5 Pro has specific strengths that could make it the better choice for certain workflows.
By Use Case
Best for Quality
Claude Fable 5
Marginally better benchmark scores; both are excellent
Best for Cost
Claude Fable 5
71% lower pricing; better value at scale
Best for Reliability
Claude Fable 5
Higher uptime and faster response speeds
Best for Prototyping
Claude Fable 5
Stronger community support and better developer experience
Best for Production
Claude Fable 5
Wider enterprise adoption and proven at scale
by Anthropic
- Choose for Quality - Marginally better benchmark scores; both are excellent
- Choose for Cost - 71% 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 Fable 5 | GPT-5.5 Pro |
|---|---|---|
| Vision (Image Input) | ||
| Function Calling | ||
| Streaming | ||
| JSON Mode | ||
| Reasoning | ||
| Web Search | ||
| Image Output |
Claude Fable 5
Anthropic
GPT-5.5 Pro
OpenAI
Claude Fable 5 saves you $192.00/month
That's 71% 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 Fable 5 | GPT-5.5 Pro |
|---|---|---|
| Context Window | 1M | 1.1M |
| Max Output Tokens | 128,000 | 128,000 |
| Open Source | No | No |
| Created | Jun 9, 2026 | Apr 24, 2026 |