The release lands amid growing debate over AI risks. Anthropic Chief Executive Officer Dario Amodei earlier this month called on the global AI community to slow down the pace of releasing new capabilities to address safety concerns.

Anthropic said Opus 5.5 underwent external testing by independent AI safety research groups Frontier Design and METR before launch and includes safeguards previously reserved for its most capable systems.

According to Anthropic, Opus 5.5 outscored rival OpenAI’s GPT-5.6 Sol on a software development benchmark while costing roughly one-third as much to run.

Opus 5.5 is priced at $4 per million input tokens and $20 per million output tokens, 20pc below Opus 5, Anthropic said.

The model is available on platforms including Amazon Web Services , Google Cloud and Microsoft Azure.

The model also scored better than previous systems in internal safety tests and was about 85pc less likely than Opus 5 or Mythos 5.1 to attempt to bypass containment boundaries in a dedicated evaluation, the company said.

Claude Sonnet 5.5 and Claude Haiku 5.5 will be released in the coming weeks, the company said, bringing many of the same performance, speed and safety improvements.

Anthropic is also expanding programmes that give vetted cybersecurity and life-sciences researchers broader access to the model.

The government on Tuesday reduced the price of petrol by Rs1.70 per litre and that of high-speed diesel (HSD) by Rs3.12 per litre.

Following the revision, petrol will retail at Rs392.05 per litre while HSD will cost Rs418.96 per litre. The government continues to levy Rs114 per litre in taxes and duties on petrol and Rs100 per litre on diesel.

According to the Petroleum Division’s notification, the new prices will be applicable for Sept 23 (Wednesday).

The price of HSD has come down from a peak of Rs520.35 recorded on April 3. Its price had started rising from Rs281 per litre after the US-Iran war broke out on February 28.

The petrol price had peaked at Rs458.41 on April 3 after beginning its upward trajectory from Rs266 in the first week of March.

Meanwhile, the government has reintroduced a raft of austerity measures in response to rising fuel prices amid the ongoing Middle East conflict. Under these measures, markets are required to close by 9pm and fuel allocations for official vehicles has been cut by 50 per cent for three months.

On September 13, Prime Minister Shehbaz Sharif also announced a “relief scheme” for users of motorcycles, autos and vehicles of up to 800cc to “alleviate the burden” of rising global oil prices.

Previously, on July 17, Petroleum Minister Ali Pervaiz Malik announced that fuel prices would now be fixed on a daily basis due to fluctuations in international market prices following renewed hostilities between Iran and the US.

Prior to this, the government had been announcing weekly revisions to fuel prices since early March, alongside measures for the conservation of fuel amid possible oil supply disruptions due to the ongoing conflict in the Middle East. The federal government in April also announced targeted relief measures to provide subsidised fuel.

The petroleum minister stated that the cabinet and the prime minister had decided to give the Oil and Gas Regulatory Authority (Ogra) the responsibility of deciding fuel prices on a daily basis based on international market trends.

Petrol is mainly used in private transport, small vehicles, rickshaws and two-wheelers, and changes in its price affect the middle and lower-middle classes.

Similarly, changes in diesel prices also impact the public at large, as it is mainly used in the heavy transport sector, power plants and large generators.

Petrol and high-speed diesel (HSD) are the major revenue earners, with monthly sales of about 700,000 to 800,000 tonnes, compared to just 10,000 tonnes of monthly demand for kerosene.