Let me rewrite this headline following the rules.

Short summary

DeepSeek V4 Flash exited preview at $0.14/$0.28 per million tokens while outperforming its larger Pro model on agentic benchmarks (82.7% on Terminal-Bench). Anthropic's Claude Sonnet 5 introductory pricing ends September 1, with headline price rising from $2 to $3 per million tokens plus a new tokenizer adding up to 35% more tokens, making the real cost increase closer to 2x. The article advises re-benchmarking smaller models and auditing token usage before the change hits.

• •DeepSeek V4 Flash launched at $0.14/$0.28 per million tokens, beating its Pro model on agent benchmarks
• •Claude Sonnet 5 pricing rises from $2 to $3/M tokens plus a new tokenizer adding ~35% more tokens, effectively doubling cost
• •Actionable advice: re-benchmark cheaper models, audit token usage, separate necessary frontier use from default

Generated with AI, which can make mistakes.