SWE-bench Verified — AI Rundown Daily

AI ToolsJul 14, 2026

Claude Sonnet 5 vs Opus 4.8: Is the Flagship Worth 2.5×?

Claude Opus 4.8 costs 2.5× Claude Sonnet 5's intro rate for a 3.4-point edge on SWE-bench Verified — 88.6 vs 85.2, as of July 2026. On most workloads that premium is wasted; on long-horizon agentic work with expensive retries, it pays for itself. After September 1 the multiple compresses to roughly 1.7×, which flips the math for borderline tasks. For PMs, the answer is a routing policy — Sonnet 5 by default, Opus 4.8 on logged escalation — not a single model choice.

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LLMsJul 14, 2026

Claude Sonnet 5 vs GPT-5.6 Terra: The Workhorse-Tier Verdict

Claude Sonnet 5 ($2/$10 intro through August 31) and GPT-5.6 Terra ($2.50/$15) are fighting for the mid-tier where most production LLM spend actually lands. Sonnet 5 posts an 85.2% SWE-bench Verified score while OpenAI no longer reports Terra to that board, and Anthropic exempts cached reads from input rate limits. The catch: Sonnet's standard $3/$15 pricing arrives September 1, handing the input-cost edge to Terra. For PMs, the choice comes down to workload shape — cache-heavy agentic work favors Sonnet 5, input-heavy stable budgets favor Terra.

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