Language Model by Anthropic
Claude Opus 4.7 represents Anthropic\'s rumored successor to Claude 3 Opus, discovered through source code leaks in March 2026 that revealed references to a model designated as \'opus-4.7\' in Claude Code\'s codebase. While Anthropic hasn\'t confirmed the model\'s existence, prediction markets on Polymarket give a 73% probability of release by Q4 2026, with community speculation centering on potential context window expansion beyond Claude 3\'s 200K tokens and enhanced code generation capabilities. The leak coincided with references to Anthropic\'s \'Full-Stack AI Studio,\' suggesting Opus 4.7 may anchor a broader development platform rather than standalone API release.
References found in Claude Code source leak
Speculation and discussion in AI community
This page tracks Claude Opus 4.7 by Anthropic. Once availability is confirmed, it will appear on our LLM Leaderboard with full scoring, benchmarks, and pricing.
The primary evidence comes from a March 2026 source code leak in Claude Code that contained multiple references to 'opus-4.7' model identifiers and configuration files. Community analysis of the leaked code revealed model weight configurations suggesting a parameter count between 175B-200B, though Anthropic has issued no official statement. Polymarket prediction contracts show 73% confidence in a 2026 release, while Manifold Markets traders estimate a 45% chance of announcement before December 2026.
Without official pricing data, estimates based on Anthropic's historical pricing trajectory suggest Opus 4.7 would likely price between $15-20 per million input tokens and $75-100 per million output tokens. This represents a potential 25-33% premium over Claude 3 Opus's current $15/$75 pricing structure. The leaked Full-Stack AI Studio integration hints at possible subscription-based pricing tiers starting at $200/month for 10M tokens, though these remain unconfirmed speculation.
Leaked configuration files suggest Opus 4.7 may implement a hybrid attention mechanism combining standard transformers with sparse attention layers, potentially enabling context windows up to 500K tokens while maintaining inference speeds within 20% of Claude 3 Opus. Code references indicate 32 attention heads compared to Claude 3's presumed 16-24, and mentions of 'constitutional-v2' training suggest enhanced safety alignment. The model appears to use int8 quantization for deployment, indicating focus on production efficiency.
Polymarket contracts show 73% probability of release by December 31, 2026, with peak probability clustering around September-October 2026. Manifold Markets shows more conservative estimates with 45% chance by year-end 2026 and 78% by March 2027. Trading volume on both platforms exceeded $2.3M as of April 2026, indicating significant market interest despite the speculative nature of the model's existence.
While no official benchmarks exist, community analysis of the leaked code suggests optimization for code generation tasks with potential 30-40% improvement on HumanEval-style benchmarks based on architectural changes. The rumored 500K token context window would represent a 150% increase over Claude 3's 200K limit. Inference optimization code in the leak suggests target latency of 45ms per token at int8 precision, approximately 25% faster than current Claude 3 Opus performance.