Anthropic has released Claude Sonnet 5.5, which it says is more than 30% faster than Sonnet 5 and up to 30% cheaper per task. The token price has not changed, so the saving comes from fewer tokens and tool calls. We work through the cost arithmetic, the benchmark table against Opus 5.5 and GPT-6 Sol, the new cyber and distillation safeguards, and whether to switch.
Tom’s Guide tested ChatGPT-6 and Claude Opus 5.5 on everyday prompts and split seven common jobs between them: Claude for planning, decisions, writing and analysis, ChatGPT-6 for structured plans, learning and quick questions. This article sets out the scorecard and the five prompts behind it, explains what “ChatGPT-6” really is inside ChatGPT, where GPT-6 Sol and Luna sit on each plan, what Claude and ChatGPT cost, and how to route everyday work between them.
AIxploria published a single card for OpenAI’s GPT-6 Sol and GPT-6 Luna at 02:51 UTC on 24 September 2026, about 33 hours after launch. We checked 14 claims against OpenAI’s model pages, pricing tables and launch reporting. Prices, context window and headline benchmarks are right, but the “half the price” promise ends for prompts over 272,000 tokens, the “not in Chat” drawback was already out of date, Luna’s later knowledge cutoff is missing, OpenAI’s alignment results are left out, and the “#5 in LLM models” badge belongs to Claude Opus 4.8.
AIxploria published its Claude Opus 5.5 card at 03:23 UTC on 24 September 2026, about 35 hours after Anthropic’s launch. We checked 14 of its claims against Anthropic’s launch post, model overview and pricing page: nine are fully correct, but the card contradicts itself on the 1M-token context window, labels a paid model Freemium, misstates the launch gap with GPT-6 Sol, drops the benchmarks GPT-6 Astra wins, and carries a “#4 in LLM models” badge for a slot Grok 4.6 already holds. Here is what the card gets right, what it gets wrong and what the price cut really means.
Anthropic released Claude Opus 5.5 and OpenAI released GPT-6 Sol and Luna on 22 September 2026, both cheaper than the models they replace, ten days after the labs’ own leaders called for a slowdown and nine weeks after the Hugging Face breach. This article sets out what Anthropic shipped to answer the safety fears, including rerouting most cyber tasks to Opus 4.8, what OpenAI said instead, why cheaper AI sharpens the risk, and how to read a safety claim attached to a price cut.
Anthropic released Claude Opus 5.5 and OpenAI added GPT-6 Sol and Luna within hours of each other on 22 September 2026, both cutting prices hard. OpenAI confirmed its new rates are permanent list prices rather than promotions. This article prices the same job on all three models, unpacks why the Anthropic 40 per cent claim is only 20 per cent on the price list, sets out where Opus 5.5 leads on benchmarks and where GPT-6 Astra still beats it, and asks how a price war squares with the industry slowdown both labs chief executives called for two weeks earlier.
Posts on X since 5 September 2026 say OpenAI is testing GPT-6 Sol, a faster sibling to GPT-6 Astra, and Sam Altman has promised a big launch this week plus six more for DevDay. We date every leak, check the “6x faster” claim, map OpenAI’s price and usage ladders, and show how quickly OpenAI usually ships smaller models.
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