Anthropic Launches Claude Opus 5.5 AI Model with 40% Cost Reduction and Faster Speed
On September 23, Anthropic released Claude Opus 5.5, the first model in its Claude 5.5 series. The company claims it matches Claude Fable 5.1 on most tasks while reducing typical task costs by 40% and increasing output speed by over 30% compared to Opus 5. Pricing is set at $4 per million input tokens and $20 per million output tokens. The model is available on Claude, AWS, Google Cloud, and Azure. Anthropic plans to release Claude Sonnet 5.5 and Haiku 5.5 in the coming weeks.
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Anthropic Launches Claude Opus 5.5, Cutting Task Costs by 40% and Boosting Speed
On September 23, Anthropic released Claude Opus 5.5, the first model in its Claude 5.5 series. The company claims the new model matches Claude Fable 5.1 on most tasks while reducing typical task costs by 40% and increasing output speed by over 30% compared to the previous Opus 5. In nine benchmark tests, Opus 5.5 outperformed Fable 5.1, Opus 5, GPT-6 Astra, and GPT-5.6 Sol in seven categories, including three programming tests, but lagged behind GPT-6 Astra in business process and scientific agent tests. On the Artificial Analysis Intelligence leaderboard, Opus 5.5 scored 58 points, ranking first. Pricing is set at $4 per million input tokens and $20 per million output tokens, a 20% reduction from Opus 5. Anthropic highlighted real-world tasks: Opus 5.5 rewrote HAProxy from C to Rust in 9.5 hours at 51% lower cost than Fable 5.1, and passed 16 of 18 financial report generation tests where Fable 5.1 and Opus 5 failed all. The model is available on Claude, AWS, Google Cloud, and Azure. However, most cybersecurity tasks are redirected to Opus 4.8 due to safety restrictions. Claude Sonnet 5.5 and Haiku 5.5 are planned for release in the coming weeks. Shortly after this launch, OpenAI released GPT-6 Sol and GPT-6 Luna.
Read sourceAnthropic Launches Opus 5.5 AI Model, Claims Performance Edge Over Fable at 40% Lower Cost
Anthropic has released Opus 5.5, the first model in its new Claude 5.5 series, with Sonnet 5.5 and Haiku 5.5 expected in weeks. The model is positioned as a direct competitor to OpenAI's GPT-6 Astra, offering API input pricing at $4 per million tokens (40% of Astra's $10) and output at $20 (vs. Astra's $50). In Anthropic's benchmarks, Opus 5.5 outperformed Astra in 4 of 6 comparable tests, including Terminal-Bench 4.0 (66.4% vs. 57.9%) and FrontierCode (54.4% vs. 53.3%), while Astra led in AutomationBench (41.4% vs. 40.0%) and Terminal-Bench-Science (64.6% vs. 58.7%). Third-party testing by Artificial Analysis gave Opus 5.5 a max-effort score of 58 vs. Astra and Fable 5.1 at 53, but noted Opus 5.5 consumes significantly more tokens per task (11.9K vs. 2.7K), making max-effort tasks more expensive ($5.98 vs. $3.26). The model features mandatory adaptive thinking, removed forced tool calling, and improved writing style. Anthropic also implemented enhanced safety measures, including a new test for boundary-crossing behavior. The article notes that Fable 5.1, released only three weeks prior, now faces an awkward position as Opus 5.5 matches or exceeds its capabilities at lower cost.
Read sourceClaude Opus 5.5 costs $5.98 per task, similar to Opus 5 at $5.86 after price cuts
An analysis of Anthropic's pricing reveals that Claude Opus 5.5 (max) costs $5.98 per Intelligence Index task, which is similar to Opus 5 (max) at $5.86. However, this price point bundles a significant token usage increase with Anthropic’s price reductions. Compared to Opus 5, Opus 5.5’s increased token usage would drive an approximately 80% increase in cost per task to $10.51. A 20% cut to base prices reduces that to $8.41, and further cutting cache reads to $0.20 brings the cost to $5.98, representing an additional 29% cut. The analysis attributes the final price to a combination of higher token consumption and multiple layers of price reductions by Anthropic.
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Anthropic Launches Cost-Efficient Opus 5.5 AI Model Ahead of Potential IPO
Anthropic PBC has released a new AI model, Claude Opus 5.5, designed to handle a broad range of enterprise tasks at a significantly lower cost than its predecessor, Opus 5. The company claims the model matches the performance of its more powerful Fable 5.1 on most work tasks while being faster and producing clearer text. This launch comes as Anthropic prepares for a highly anticipated Wall Street debut, with an IPO expected as early as this fall, ahead of rival OpenAI's planned 2026 IPO. The company is also planning to release new versions of Claude Sonnet and Haiku in the coming weeks to expand the 5.5 series. CEO Dario Amodei, who has called for the industry to slow the pace of AI development, stated that the company has implemented new safety measures, including third-party evaluations by METR and Frontier Design, and deployed safety guardrails similar to those on the more powerful Fable model to limit high-risk cybersecurity and biological applications.
Anthropic Opus 5.5 beats Fable 5.1 on all benchmarks; OpenAI GPT-6 Luna scores 66.6% on DeepSWE 1.1
A news intelligence analyst recaps the day's AI model releases from Anthropic and OpenAI, concluding there is no clear winner. Anthropic addressed user feedback on Opus communication and introduced a subscriber reset feature. Its Opus 5.5 model scores above Fable 5.1 on every benchmark in Anthropic's comparison table, delivering Fable 5.1-level performance on most work at roughly 40% lower cost than Opus 5. Sonnet 5.5 and Haiku 5.5 are expected in coming weeks. OpenAI's GPT-6 Luna achieved 66.6% on DeepSWE 1.1 at max effort, comparable to Fable 5 at medium effort but at 96% lower cost per task. Luna's API pricing is $0.10 per million input tokens and $0.50 per million output tokens. GPT-6 Sol approaches Astra's factual reliability on internal evaluations and outperforms low-effort Astra on AutomationBench at xhigh effort. The analyst also notes unverified rumors about an OpenAI counterpart to Grok Bot.
Anthropic and OpenAI Launch New AI Models, Intensifying Price War
On September 22, Anthropic released the Claude Opus 5.5 model, claiming performance comparable to its flagship Fable 5.1 at 40% lower cost than Opus 5, with pricing at $4 per million input tokens and $20 per million output tokens, a 20% reduction. The model scored higher than OpenAI's GPT-5.6 Sol on the CursorBench programming benchmark at one-third the cost. OpenAI simultaneously launched GPT-6 Sol and GPT-6 Luna. GPT-6 Sol is priced at $2 per million input tokens and $10 per million output tokens, 50% cheaper than GPT-5.6 Sol's promotional price, with half the error rate. GPT-6 Luna costs $0.10 per million input tokens and $0.50 per million output tokens, matching GPT-5.6 Sol's performance at high reasoning intensity for about 1% of the cost. OpenAI claims GPT-6 Sol outperforms Anthropic's Claude Opus 5 by 6.3% on the AutomationBench test at 9% of the cost. Both companies highlighted safety improvements: Anthropic said Opus 5.5's probability of attempting to breach isolation boundaries is 85% lower than prior models, while OpenAI reported reduced rates of bypassing restrictions. The releases come amid investor speculation that Anthropic's new model could precede its IPO filing, as the market watches for growth amid price-sensitive customers.
Read sourceAnthropic Launches Cheaper Opus 5.5 AI Model Ahead of Anticipated IPO
On September 23, Anthropic announced the launch of a new AI model, Claude Opus 5.5, designed to handle a variety of business tasks at a lower cost. This move is part of the company's strategy to maintain a competitive edge ahead of its highly anticipated Wall Street IPO. According to Anthropic, the Opus 5.5 model delivers performance comparable to its more powerful Fable 5.1 model in most work scenarios, while being significantly cheaper to use than the previous Opus 5 version. The company also stated that the new model offers faster output speeds and produces clearer content. Anthropic plans to expand its 5.5 series in the coming weeks with new versions of Claude Sonnet and Haiku.
Read sourceAnthropic Launches Cheaper Claude Opus 5.5 AI Model Ahead of Anticipated IPO
Anthropic has released a new AI model, Claude Opus 5.5, on Tuesday, designed to handle a variety of business tasks at a lower cost. The company claims the model's performance is comparable to its more powerful Fable 5.1 in most work scenarios, while being significantly cheaper to use than the previous Opus 5 version. Additionally, Opus 5.5 offers faster output speeds and generates clearer content. This launch is part of Anthropic's strategy to maintain a competitive edge ahead of its highly anticipated Wall Street IPO. The company plans to expand its 5.5 series in the coming weeks with new versions of Claude Sonnet and Haiku.
Read sourceAnthropic launches Claude Opus 5.5 AI model, claiming lower cost for enterprise tasks
Anthropic released its new AI model, Claude Opus 5.5, on Tuesday, designed to handle a wide range of enterprise tasks at a lower cost. According to Anthropic, the model performs similarly to the more capable Fable 5.1 on most work tasks, while being significantly cheaper than the previous Opus 5. The new model also generates results faster and produces clearer text. Anthropic plans to expand the 5.5 series in the coming weeks with new versions of Claude Sonnet and Haiku. Opus 5.5 is the first new model released since Anthropic CEO Dario Amodei called for the AI industry to slow down the pace of technical development. Amodei previously stated that the company would adopt new safety measures, including introducing third-party evaluators.
Read sourceClaude Opus 5.5 tops Artificial Analysis Intelligence Index, beating Fable 5.1 and GPT-6 Astra
In a post on X, user Mr_Salio announced that Claude Opus 5.5 has achieved the number one position on the Artificial Analysis Intelligence Index. The post claims that Opus 5.5 outperformed both Claude Fable 5.1 and GPT-6 Astra in the ranking, using informal language to describe the competitive result. Additionally, the post asserts that Opus 5.5 is significantly cheaper than both competing models. The announcement includes a link to the Artificial Analysis website for further details. The post attributes the ranking to the Artificial Analysis Intelligence Index, an external benchmark, and presents the information as a factual development in the AI model landscape. No further context or methodology is provided in the post itself.
Anthropic's Opus 5.5 cuts AI coding bills by 40%, outperforms GPT-6 Astra at 20% cost
Aakash Gupta reports that Anthropic's new Opus 5.5 model will significantly reduce AI coding costs, far exceeding the commonly cited 20% price drop on regular tokens. The key savings come from a 60% reduction in the cost of re-reading files, which constitutes most of an AI agent's expenses. Additionally, the model requires fewer steps to complete tasks, with one early tester fixing a 200,000-line codebase in under 3 hours compared to over 20 hours for the old Opus. Anthropic states the typical bill drops about 40% when combining these factors. In a test measuring whether AI code would be approved by a real team, Opus 5.5 on its normal setting beat the best score ever posted by OpenAI's GPT-6 Astra, at roughly a fifth of the cost per task. Gupta notes this is the first time in the AI race that the top-performing coding model is also the cheaper one to run, posing a challenge for OpenAI to respond with a price cut.
Claude Opus 5.5 launches claiming Fable 5.1-level performance with 40% cost cut
Anthropic has released Claude Opus 5.5, a new AI model that claims to deliver performance comparable to Fable 5.1 while reducing typical workload costs by 40%. The pricing for input and output tokens has been set at $4 and $20 per 1 million tokens respectively, representing significant reductions compared to Opus 5. Cache read costs have dropped 60% to $0.20. Additionally, the model's output arrives more than 30% faster, with a Fast mode option that reaches up to 2.5x speed at double the token prices. These updates position Claude Opus 5.5 as a more cost-effective and efficient alternative in the AI model market.
Read sourceAnthropic's Opus 5.5 scores 58 on Artificial Analysis Intelligence Index, topping Fable 5.1 and GPT-6 Astra
A post on X reports that Anthropic's AI model, Opus 5.5, has achieved a score of 58 on the Artificial Analysis Intelligence Index. This score surpasses the next highest scores in the chart, which are 53 for both Fable 5.1 and GPT-6 Astra. The post expresses surprise at the performance, questioning what Anthropic used to train the model. The source is a user named DanDr1s, and the post includes a link to further information. The claim is presented as a new development in AI model benchmarking.
Read sourcePerplexity AI launches Claude Opus 5.5 as Standard effort level, beating Fable 5.1 at lower cost
Perplexity AI announced the availability of Claude Opus 5.5 as the Standard effort level in Perplexity Computer. According to the company's announcement, the model scored 0.610 on their WANDR benchmark at a cost of $4.13 per task. This result slightly outperforms Claude Fable 5.1 while costing 67.6% less per task, representing a significant improvement in cost efficiency for the same benchmark performance tier.
Anthropic launches Claude Opus 5.5 on OpenRouter with 1M context at $4 per million input tokens
Anthropic has released Claude Opus 5.5, the first model in the Claude 5.5 family, now available on OpenRouter. According to the announcement, the model leads Opus 5 and Fable 5.1 on agentic coding, knowledge work, and computer use. It offers a 1 million token context window at a price of $4 per million input tokens and $20 per million output tokens, which is 20% lower per token than Opus 5. The post does not specify a release date or provide further technical details beyond these performance claims and pricing.
Read sourceClaude Opus 5.5 tops AI Index with 58 score, gets 20% price cut and larger cache discount
Anthropic's Claude Opus 5.5 has achieved the top score of 58 on the Artificial Analysis Intelligence Index, surpassing previous models by several points. The model brings Anthropic to parity with OpenAI's GPT-6 Astra on evaluations such as Terminal-Bench 4.0 and AutomationBench-AA, while extending Anthropic's lead in agentic knowledge work. Anthropic has simultaneously reduced pricing by 20%, with input/output tokens now costing $4/$20 per 1M tokens, down from $5/$25 for Opus 5. Cache reads have been discounted 60% to $0.20 per 1M tokens, representing a 95% discount compared to uncached input pricing. The model leads on six of ten Intelligence Index evaluations including Humanity's Last Exam (61.4%), SciCode (66.9%), and AutomationBench-AA. On agentic knowledge work evaluation AA-Briefcase, it achieved an Elo of 1822, surpassing GPT-5.6 Sol in presentation quality for the first time for Anthropic. The model maintains a 1 million token context window and offers five effort settings, with four of five sitting on the Intelligence vs Cost per Task Pareto frontier.
Read sourceOpus 5.5 AI model launches with lower token cost and Fable 5.1 intelligence
The developer of the Opus AI model series announced the release of Opus 5.5, a new version developed in response to user feedback. According to the announcement, Opus 5.5 communicates more clearly and is cheaper per token than its predecessor Opus 5.0, while matching the intelligence level of Fable 5.1. The model is described as highly token efficient and capable of working across every effort level. Additionally, the company is increasing 5-hour rate limits and introducing a banked reset feature for users. The post does not specify a release date or pricing details beyond the comparative cost claim.
Anthropic releases Claude Opus 5.5, beating Fable 5.1 on multiple benchmarks
Anthropic has officially released Claude Opus 5.5, a new AI model that outperforms Fable 5.1 on several benchmarks including Terminal-Bench 4.0, FrontierCode, CursorBench, GDPval-AA, HLE, OSWorld 2.0, and Chartography. The model also beats GPT-6 Astra on a couple of benchmarks, though Astra still leads on several others. Pricing is set at $4 per million input tokens and $20 per million output tokens, with cache reads at $0.20 and cache writes at $5, down from $5/$25 for Opus 5. Anthropic claims a 40% lower cost per task due to both lower token prices and fewer tokens used. A fast mode is available at $8 input and $40 output per million tokens with up to 2.5x speed. The poster notes they need to test the token efficiency themselves, which was their main interest in Opus 5.5.
Read sourceAnthropic Launches Claude Opus 5.5 on AWS, Google Cloud, Azure With Lower Pricing
Anthropic announced the full launch of Claude Opus 5.5 across major cloud platforms including Amazon Web Services (AWS), Google Cloud, and Microsoft Azure. The new model is priced lower than its predecessor Opus 5, leading to a 25% expansion in 5-hour and weekly usage quotas. For subscription users, the five-hour usage limit for Opus 5.5 will increase by 20% across all plans. In most tasks, Claude Opus 5.5 performs comparably to Claude Opus 5.1 while reducing operating costs by approximately 40% compared to Opus 5. The pricing is set at $4 per million input tokens and $20 per million output tokens. Anthropic also indicated that it will release two additional models, Claude Sonnet 5.5 and Claude Haiku 5.5, in the coming weeks.
Read sourceClaude Opus 5.5 launches with 40% lower cost and performance matching Fable 5.1
Anthropic has introduced Claude Opus 5.5, a new AI model that offers a 40% reduction in cost compared to Opus 5, with cache reads priced 60% cheaper. The model reportedly performs at the level of Claude Fable 5.1 for most tasks, according to the announcement posted by addyosmani on X. The post also included a celebratory visualization of a pelican riding a bike created in Three.js. No further details on availability, benchmarks, or specific use cases were provided in the announcement.