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Anthropic Launches Opus 5 With Lower Costs And Fewer Restrictions

Anthropic has launched Opus 5, the latest version of its flagship AI model, continuing the rapid expansion of its 5-series lineup just two months after the release of Opus 4.8.

The company said Opus 5 is designed to deliver stronger performance at a lower cost than Fable 5 while introducing fewer restrictions for enterprise users.

A Premium Model With A More Practical Proposition

Although Opus 5 is smaller than Fable 5, Anthropic said it is cheaper to run and less restrictive. The company also said the model outperformed Fable 5 on several internal benchmarks, suggesting improved efficiency without sacrificing performance.

Opus 5 follows the recent launches of Mythos 5, Fable 5 and Sonnet 5, leaving Haiku as the only model in Anthropic’s portfolio yet to receive a 5-series upgrade.

Anthropic Emphasizes Reliability And Iteration

According to Anthropic, Opus 5 is “much stronger at verifying its work and iterating carefully until it succeeds.” As an example, the company said the model independently built a computer vision pipeline from an incomplete prompt during internal testing.

The release reflects Anthropic’s continued focus on improving reasoning capabilities and reducing the amount of human intervention required for complex tasks.

Fewer Restrictions, But Cybersecurity Guardrails Remain

Unlike Fable 5 and Mythos, Opus 5 is not subject to Anthropic’s 30-day data retention policy. The company said the model is intended for customers seeking greater flexibility while maintaining existing security protections.

Restrictions remain for cybersecurity-related tasks. Anthropic said Opus 5 cannot be used to scan software binaries for vulnerabilities, although it can analyse source code for security flaws, which the company classifies as defensive security work.

Anthropic also said its safety classifiers are expected to activate 85% less frequently for Opus 5 than for Fable 5.

A Smaller Friction Point For Developers

The company is also rolling out a beta feature called Automatic Fallbacks. If a prompt triggers a safety classifier, participating API users will automatically be routed to a less capable model instead of receiving an error.

Anthropic said the feature is intended to reduce workflow interruptions for developers while maintaining existing safety measures.

Bitcoin Surges 23% In A Week As Investor Optimism Returns

Bitcoin was on track for a weekly gain of around 23% on Friday as a series of positive macroeconomic and policy developments boosted investor sentiment.

The cryptocurrency was trading about 6% higher at roughly $77,000, up from around $62,800 at the start of the week. Crypto-related stocks also rallied, with Coinbase and Circle gaining more than 9%, while Strategy rose 7%.

Macro Factors Fuel Rally

Bitcoin’s latest surge began Wednesday after Treasury yields fell sharply following a major intervention by the U.S. Treasury in the bond market. Lower yields eased pressure on risk assets and helped trigger a broader move into cryptocurrencies.

The rally was further amplified by a major short squeeze. Around $2.7 billion in crypto short positions were liquidated, according to CoinGlass.

Max Stuedlein, head of Partnerships at Sygnum APAC, said the move reflected an alignment of macroeconomic and policy catalysts, including the Treasury’s decision to increase buybacks of longer-dated government debt.

Clarity Act Boosts Sentiment

Investor confidence improved further on Thursday as the White House and crypto industry leaders made a final push to advance the Clarity Act in the coming weeks.

The legislation is widely viewed as a potential catalyst for the crypto market, although its chances of passing remain relatively limited.

Despite the rally, bitcoin remains well below its 2026 high of $94,820 reached in January and its all-time high of $126,198, set last October.

Analysts See More Volatility Ahead

Lucy Gazmararian, founder and managing partner at Token Bay Capital, said the crypto market may be approaching the end of its bear cycle.

She expects bitcoin could experience one more decline of around 20% before the market turns, pointing to historical cycles and the recent liquidation of heavily leveraged short positions.

Gazmararian also described bitcoin as a long-term hedge against monetary debasement, while warning that its short-term price remains highly volatile and driven by market cycles.

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