Claude Opus 5.5

Your browser does not support the video tag. 0:00 Meta researchers introduce Muse Wonder and its Active Memory, Meta Muse Wonder in 30 Seconds Meta released its first frontier models, Muse Wonder and Muse Wonder Full, on October 12, 2026. Muse Wonder costs $4 input / $20 output per million tokens on the Meta Model API, with cached input at $0.20. That is exactly Claude Opus 5.5’s price. The stronger Wonder Full is not on the API. You only get it inside Muse Code, on the $50 and $200 monthly plans. It leads on memory and long-horizon coding (MemoryBench 85.6, DeepSWE 78.8, both ahead of Opus 5.5) but trails Opus 5.5 on the Artificial Analysis Intelligence Index. Meta’s first frontier model costs exactly what Claude Opus 5.5 costs, down to the cached-input rate, and scores 6 points lower on the most widely cited independent index. What it offers in return is something none of its rivals do as well: remembering what matters across a long conversation. ...

Your browser does not support the video tag. 0:00 Claude Haiku 5.5: price, GPT-6 Luna comparison and where to use it Claude Haiku 5.5 in 30 Seconds Price: $0.10 per million input tokens and $0.50 per million output tokens for prompts up to 100K tokens; $0.50 / $2.50 above that. That is 90% below Haiku 4.5 and exactly GPT-6 Luna’s rate. Real saving: about 75% on an average workload, once the new tokenizer and the long-prompt tier are counted. Use it for summaries, classification, compaction, browser and computer use, and as a subagent under Sonnet 5.5 or Opus 5.5. Do not use it as the lead model on complex agentic coding. Released October 7, 2026, on the Claude Platform, AWS, Google Cloud and Azure. Model ID: claude-haiku-5-5. Anthropic released Claude Haiku 5.5 on October 7, 2026, closing out the 5.5 family that started with Opus 5.5 on September 22 and Sonnet 5.5 on September 28. There was never a Haiku 5: the line jumped straight from Haiku 4.5. ...

Your browser does not support the video tag. 0:00 Gemini 4 Argon vs Claude Opus 5.5: price and independent test results Argon vs Opus 5.5 in 30 Seconds Price: Argon’s $2 / $10 is a launch promotion. Google’s own footnote says the price moves to $4 / $20 once it ends, exactly what Opus 5.5 costs. The promo ends on 30 November 2026. Independent benchmarks: On the Artificial Analysis Intelligence Index, Opus 5.5 scores 58 and Argon 53. Cost per task is $1.99 for Argon at promo pricing versus $5.98 for Opus. Hallucinations: Argon’s hallucination rate is 15%, Opus 5.5’s is 59%. Argon says “I don’t know” far more often, while Opus knows more but also guesses when it shouldn’t. Coding: Opus leads Terminal-Bench 4.0 in both Google’s table and the independent run. Argon leads on workflow automation. Access: Both are available today. Argon opened on 13 October to Pro and Ultra subscribers in the Gemini app and the paid API tier. When Google announced Gemini 4 Argon on September 30, the headline number was simple: a frontier model at half the price of Claude Opus 5.5. A day later, two things are clearer. That price has an expiry date, and the first independent benchmark run puts the two models in a different order than Google’s own chart. ...

Short Answer Default to Sonnet 5.5. It costs exactly half of Opus 5.5 on input and output ($2 / $10 vs $4 / $20 per million tokens), runs 30%+ faster than Sonnet 5, and lands within a few points of Opus 5.5 on most published benchmarks. Escalate to Opus 5.5 for complex, open-ended work that needs sustained judgment: architecture, long ambiguous investigations, anything where a wrong turn is expensive. Anthropic says Opus 5.5 “remains clearly stronger” there. Sonnet 5.5 was released on 28 September 2026. Model ID: claude-sonnet-5-5. Update, October 7, 2026 With the Claude Haiku 5.5 launch, Anthropic halved Sonnet 5.5 cache reads from $0.20 to $0.10 per million tokens, which it says makes Sonnet 5.5 about 20% cheaper on most agentic work. The table below is updated; the price chart shows the old rate. What Changed With Sonnet 5.5 Anthropic released Claude Sonnet 5.5 on 28 September 2026, six days after Opus 5.5 . It is available in the Claude apps, Claude Code, the Claude API, and on Amazon Web Services, Google Cloud and Microsoft Azure. Haiku 5.5 follows in the coming weeks. ...

The Short Version Sol and Luna are not new names: they arrived this summer as part of GPT-5.6. On 22 September 2026 OpenAI moved both to GPT-6 and halved the price, roughly 90 minutes after Anthropic shipped Claude Opus 5.5. Sol: $2 in / $10 out per million tokens. Opus 5.5 is $4 / $20, so Sol is exactly half. Luna: $0.10 / $0.50, 40x cheaper than Opus 5.5. Free and Go users get it in the ChatGPT desktop app. Every OpenAI chart compares against Opus 5, not Opus 5.5. On the one benchmark both vendors report, Opus 5.5 leads: 40.0% vs 33.2% on AutomationBench. Pick Opus 5.5 for quality, Sol for volume, Luna for simple high-volume jobs. GPT-6 Sol vs GPT-5.6 Sol: What Changed? The Sol, Terra and Luna tiers first shipped this summer with GPT-5.6 . Earlier this month GPT-6 Astra took the top slot, while Sol and Luna stayed on GPT-5.6. This release moves those two onto the GPT-6 generation: Sol for coding and agentic work, Luna for high-volume jobs with a clear goal, such as summarising documents, extracting fields or answering quick questions. ...