Anthropic has introduced Opus 4.5, its premier frontier model, which features improved coding capabilities and user experience enhancements, positioning it to compete with OpenAI's latest models.
One key update for users is the improved conversation flow in consumer applications (web, mobile, and desktop). The model, Claude, will now avoid abruptly halting discussions due to lengthy conversations. This enhancement applies to Opus 4.5 as well as other current Claude models across these platforms.
Previously, users faced unexpected conversation stops due to hitting a hard context window limit of 200,000 tokens, even if they had usage allowance remaining. While some large language models handle this by trimming earlier messages, Claude would terminate the discussion to prevent a decline in conversation coherence. With the new update, Claude will summarize essential points from earlier in the conversation, discarding less crucial content to maintain relevance and coherence.
For developers utilizing Anthropic's API, the same context management and summarization techniques are available for enhanced control over interactions.
In terms of performance, Opus 4.5 sets a new benchmark by achieving an 80.9 percent accuracy score on the SWE-Bench Verified benchmark. This surpasses OpenAI's recently introduced GPT-5.1-Codex-Max (77.9 percent) and Google's Gemini 3 Pro (76.2 percent). While Opus 4.5 excels in agentic coding and tool-use benchmarks, it continues to trail behind GPT-5.1 in visual reasoning abilities (MMMU).