Anthropic launches Claude Opus 5.5, matching flagship intelligence at 40% lower cost

OpenAI has launched two new models in the GPT-6 family, GPT-6 Sol and GPT-6 Luna, priced 50% lower than the promotional pricing of the previous generation. The launch follows the release of GPT-6 Astra, the flagship model unveiled in early September, which remains the primary model for high-end projects requiring maximum capability. Sol and Luna, meanwhile, are designed as low-cost options for general professional work, including coding, automation, and computer command-and-control tasks. For GPT-6 Sol, pricing is 2 US dollars per 1 million input tokens and 10 US dollars per 1 million output tokens, which is 50% cheaper than the promotional pricing of GPT-5.6 Sol. GPT-6 Luna is priced at 0.10 US dollars per 1 million input tokens and 0.50 US dollars per 1 million output tokens. OpenAI said it trained the Sol and Luna models using the same techniques as Astra, and issued safety warnings alongside the release, acknowledging that a flagship model like Astra may in some situations exhibit behaviour that seeks to evade human oversight and control. This comes amid intense scrutiny of the behaviour of OpenAI's AI agent systems, after a previous incident in which an AI agent covertly accessed another company's systems without authorisation.

Artificial intelligence developer Anthropic and medical information platform OpenEvidence announced on the 22nd that they are partnering to provide AI-powered clinical decision support tools to doctors in low- and middle-income countries. OpenEvidence is a service that answers doctors' questions based on peer-reviewed medical research and treatment guidelines, and it is available free of charge to clinicians in the United States and Europe. Under the new initiative, a specialized version will be provided free of charge to healthcare workers in dozens of low- and middle-income countries where limited access to medical literature, expert knowledge, and continuing medical education could hinder patient care. According to a list released by OpenEvidence, the initiative will be rolled out in about 100 countries, including Uganda, Angola, Sudan, Haiti, and Mongolia. According to the two companies, Anthropic's technology will provide the backend infrastructure, while OpenEvidence will optimize the system for each region based on local medical infrastructure. They did not disclose the financial terms of the partnership.

Foreign investors returned to buying Thai stocks, with net purchases of 52.68226 billion baht from the start of the year through September 22, comprising 6.60989403 trillion baht in buys and 6.55721177 trillion baht in sells. In September alone, net buying reached 1.31328 billion baht, from 626.56138 billion baht in buys and 625.24810 billion baht in sells, marking the highest foreign buying in two months and making the Thai stock market the most sought-after in ASEAN. The supporting factor came from Meta's launch of a new AI model with higher processing efficiency, offered free of charge, which the market expects will extend its advertising business and accelerate demand for AI CAPEX, benefiting Thai component stocks, especially DELTA and HANA. Meanwhile, Infra Tech stocks drew support from the NBTC's proposal for a data center board to set new investment criteria, including requiring operators to have power purchase agreements and water supply certificates, to use domestic materials no less than 50%, and to add sustainability requirements. This is expected to boost industrial estate stocks such as AMATA and WHA, power stocks such as GULF, BGRIM and GUNKUL, bank stocks such as KBANK, KTB, KKP and BBL, as well as contractor stocks such as STECON, PYLON and INSET. At the same time, the Cabinet meeting approved extending the Thai Help Thai Plus 40/60 Phase 2 project by another 2 months, from October 1 to November 30, 2026, with a total budget of 42.69 billion baht, and approved an additional 700 baht per person in product purchase credit for state welfare cardholders for October only, bringing the total injection to 1,000 baht per person. This measure is expected to benefit retail stocks such as CPAXT, BJC and CPALL, as well as consumer goods stocks such as CBG and OSP, in a second-round effect.