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Mercury 2.5 Preview is Inception Labs' latest diffusion-based LLM (dLLM), generating and refining tokens in parallel rather than sequentially to reach 1,100+ tokens/second with a 260K-token context window. It delivers a 10+ point intelligence jump over Mercury 2 (comparable to cost-optimized frontier models like Claude Haiku 4.5 and Gemini 3.5 Flash-Lite) with tunable reasoning, parallel tool calls, and schema-aligned JSON output, and this preview targets latency-sensitive search agents, voice pipelines, and coding subagents.
Claude Haiku 4.5 is Anthropic's fast, affordable small model in the Claude 4 generation, balancing strong instruction-following and coding ability with low latency. It is designed for high-throughput agentic and chat applications where speed and cost efficiency are priorities.
Benchmarks
Head-to-head scores across reasoning, coding, and agentic indices, plus per-domain rankings.
Intelligence
Claude Opus 5.5 (Max, Default Fallback)Claude Sonnet 5.5 (Max, Default Fallback)
