November 2025: The New Benchmark Leaders
Claude 4.5 vs GPT-5.1 vs Gemini 3 Pro — and what Claude 5 must beat
| Model | Context Window | SWE-bench Verified | ARC-AGI-2 | Pricing (Input/Output) | Coding |
|---|---|---|---|---|---|
Claude Sonnet 4.5 Released Sept 2025 | 200K tokens | 77.2% | ~23% (est.) | $3 / $15 | Best |
GPT-5.1 Released Nov 2025 | 400K tokens | 76.3% | ~25% (est.) | Not disclosed | Excellent |
Gemini 3 Pro Released Nov 2025 | 1M tokens | Not disclosed | 31.1% | Not disclosed | Excellent |
Claude 5 Estimated Q2-Q3 2026 | 500K-1M tokens? | 90%+? | 50%+? | $3-5 / $15-20? | Near-AGI? |
- SWE-bench Verified: Official leaderboard at swe-bench.github.io
- ARC-AGI-2: The Algorithmic Bridge, "Google Gemini 3 Is the Best Model Ever"
- Pricing: Anthropic official documentation (Claude 4.5 only)
- GPT-5.1 & Gemini 3 pricing not yet publicly disclosed
The November 2025 Landscape: What Changed
November 2025 saw a seismic shift in the LLM market. GPT-5.1 (Nov 13) and Gemini 3 Pro (Nov 18) launched within days of each other, dramatically raising the bar for Claude 5. Here's what Anthropic is up against:
With 77.2% on SWE-bench Verified—the highest score ever achieved—Claude Sonnet 4.5 is the undisputed king of coding AI. It achieved 0% error rate on Replit's internal benchmark, demonstrating unprecedented reliability for production code.
Gemini 3 Pro scored 31.1% on ARC-AGI-2 (the 'IQ test' for AI), a 523% improvement over its predecessor. It won 19 out of 20 benchmarks against Claude 4.5 and GPT-5.1, with a massive 1M token context window.
GPT-5.1 achieved 76.3% on SWE-bench and 94% on AIME 2025 (top 0.1% human performance in mathematics). Its adaptive reasoning feature dynamically adjusts thinking time, providing 30% better token efficiency than GPT-5.
To stand out in 2026, Claude 5 needs to exceed 85-90% on SWE-bench, reach 500K-1M token context, and maintain Anthropic's reliability advantage. The bar has been raised dramatically by the November 2025 releases.
Claude 4.5 costs $3/$15 per million tokens, while GPT-5.1 and Gemini 3 pricing remain undisclosed. If Google or OpenAI undercut Anthropic significantly, Claude 5 will need to compete on either price or performance.
Developer surveys show Claude 4.5 as 'the most reliable' for production code, GPT-5.1 as 'the best ecosystem,' and Gemini 3 as 'the fastest for UI tasks.' Claude 5 needs a clear differentiation strategy to win market share.
Real-World Performance Snapshot (November 2025)
Sources: All data from verified November 2025 releases—TechRadar hands-on testing, InfoQ technical analysis, The Algorithmic Bridge benchmark reports, and official documentation from Anthropic, OpenAI, and Google. Claude 5 specifications are projections based on Anthropic's historical 8-10 month release cycles and competitive positioning requirements.