OpenAI and Anthropic Launch Cheaper AI Models With GPT-6 Sol, Luna and Claude Opus 5.5
27 Sources
[1]
New Anthropic, OpenAI models make same promise: A little more for a lot less money
OpenAI and Anthropic both recently released new models aimed at lowering costs. Anthropic announced Opus 5.5, the latest version of its main mass-market workhorse model, used for tasks like coding and other complex knowledge work. And OpenAI announced GPT-6 Sol and Luna, the latest versions of its
[2]
Anthropic and OpenAI Drop New High-Efficiency Models - CNET
Blake has over a decade of experience writing for the web, with a focus on mobile phones, where he covered the smartphone boom of the 2010s and the broader tech scene.... Read full bio Both OpenAI and Anthropic dropped new models on Tuesday, each highlighting enhanced speed while being cheaper
[3]
OpenAI's GPT-6 Sol doubles its accuracy rate - for half the cost - ZDNET
* OpenAI says GPT-6 Sol makes half as many mistakes as GPT-5.6. * GPT-6 Luna matches previous higher-tier AI performance at far lower cost. * OpenAI's real pitch is cheaper AI, not just smarter AI. Today, OpenAI is announcing the release and general availability of its new mainstream models,
[4]
Frontier AI keeps racing despite calls to slow down
Despite a July open letter from AI company employees calling for frontier AI labs to slow their pace of development, a message echoed by Anthropic CEO Dario Amodei earlier this month, major model releases continue to appear at quite a clip. Anthropic and OpenAI each released new versions of their
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OpenAI returns fire against Anthropic's Opus 5.5 with better, cheaper GPT-6 models
* OpenAI launches GPT‑6 Sol and Luna, touting big cost‑intelligence gains. * Sol and Luna cost 50% less than GPT‑5.6 promo pricing, thanks to caching and inference wins. * Pricing: Sol $2/1M in, $10/1M out; Luna $0.10/1M in, $0.50/1M out. Phew; I did say the world of AI moves quickly, didn't I?
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Anthropic and OpenAI announce more powerful (and cheaper) AI models - Engadget
The conversation in the AI industry has largely been focused on slowing down AI development or "pacing the frontier," but that apparently won't stop Anthropic and OpenAI from releasing new models. Both companies are iterating on their previous releases, Fable 5.1 and GPT-6 Astra, with new models
[7]
OpenAI Releases New GPT-6 Sol and Luna Models, Sells Them as Mini-Astras
OpenAI has released two newcomers to its GPT-6 family of models, promising lower token costs, more intuitive communication, and an ongoing effort to prevent the kind of rogue agent behavior that has hung heavy over the company in recent months and added more fuel to already heated AI safety
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ChatGPT's new GPT-6 Sol and Luna models are faster, better, and far more affordable
Both models are available today in ChatGPT Work and Codex for ChatGPT subscribers. It's been a few weeks since OpenAI introduced GPT-6 Astra and took the internet by storm. Now, the company is introducing new, more cost-effective GPT-6 models for users who need a powerful AI model at a
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OpenAI halves GPT-6 prices with Sol and Luna
They are also half the price per token, and even less per task. Sam Altman wrote that on X on Tuesday, about GPT-6 Sol and GPT-6 Luna. OpenAI released both models the same afternoon. They extend the GPT-6 family below GPT-6 Astra, which arrived on 3 September. The prices are the headline. In its
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ChatGPT-6 Sol and Luna are here: Pricing and benchmarks data
Not to be outdone by Anthropic, OpenAI is launching a couple of new ChatGPT models on Tuesday. Mere hours after the launch of Claude Opus 5.5, GPT-6 Sol and Luna became available to users, per an OpenAI blog post. These new models are said to provide better accuracy at a more cost-efficient value
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OpenAI releases GPT-6 Sol and Luna models, slashing API costs 50% or more
OpenAI is expanding its lineup of AI models with the new GPT-6 Sol and GPT-6 Luna, mid-priced and lower tier models designed to serve as enterprise workhorses for common tasks requiring less intelligence -- and both are priced at half or less the costs of their predecessors when accessed over
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OpenAI cuts GPT-6 Sol and Luna API prices by 50%
OpenAI attributed the price reductions to improvements in caching and inference. The company says GPT-6 Sol makes roughly half as many factual errors as its predecessor and is approaching the reliability of GPT-6 Astra, the flagship model released earlier this month, at a lower cost. Sol targets
[13]
OpenAI Launches GPT-6 Sol and Luna Minutes After Anthropic Drops Claude Opus 5.5
OpenAI released two new models, GPT-6 Sol and GPT-6 Luna, on Tuesday. It happened minutes after Anthropic launched Claude Opus 5.5, its own new flagship. Sol and Luna sit below GPT-6 Astra, the model OpenAI called "the most intelligent and aligned model in the world" when it launched on September
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Anthropic releases Claude Opus 5.5 and OpenAI counters with two cheaper GPT-6 models
Anthropic releases Claude Opus 5.5 and OpenAI counters with two cheaper GPT-6 models Despite rampant worries about runaway artificial intelligence, the two big AI model makers aren't yet slowing down: Anthropic PBC released Claude Opus 5.5 today and cut its price 20%, and minutes later OpenAI
[15]
Anthropic's New Claude Opus 5.5 Matches Fable at 60% the Price
It's the first model Anthropic has shipped since CEO Dario Amodei called on the industry to slow AI capability gains, and it carries the same cybersecurity and biology safeguards as Fable 5.1. Anthropic released Claude Opus 5.5 on Tuesday, the first model in what the company is calling its Claude
[16]
ChatGPT and Claude Just Ditched Their Most Annoying, Time-Wasting Habit
Anthropic and OpenAI just dropped new AI models, and they both come with a welcome change: the chatbots ramble less. On Tuesday, Anthropic launched Opus 5.5, the latest addition to the Claude 5.5 family. OpenAI also released two new models, GPT-6 Sol and Luna, the successors to GPT-6 Astra. Both
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OpenAI Launches GPT-6 Sol and GPT-6 Luna With Lower Prices, Improved Performance
* GPT-6 Sol scored 33.2 percent on AutomationBench * GPT-6 Sol scored 68.8 percent on DeepSWE * OpenAI said GPT-6 Sol made about half as many factual errors OpenAI has launched GPT-6 Sol and GPT-6 Luna, two new models that extend some of the capabilities of its GPT-6 Astra model to lower-cost
[18]
OpenAI expands GPT-6 lineup with cheaper Sol and Luna models
The launch of low-cost GPT-6 Sol and GPT-6 Luna follows the rollout of GPT-6 Astra, a faster model for handling more tasks than previous iterations, earlier this month. OpenAI on Tuesday expanded its GPT-6 AI lineup with two models priced at half the promotional rates of their predecessors, while
[19]
OpenAI Unleashes A New Price War, With GPT-6 Sol And GPT-6 Luna Now Priced Below Claude Opus 5.5 And DeepSeek's V4.1 Flash, Respectively, Negating The Rationale For Open-Weight Models
OpenAI has just done the unthinkable by offering unparalleled performance per dollar with its GPT-6 Sol and GPT-6 Luna models, with the latter's API prices even lower than those from the reigning champ of efficiency, DeepSeek's V4.1 Flash. Also, with Anthropic and OpenAI both releasing newer
[20]
OpenAI Goes After AI Costs With GPT-6 Sol and Luna, Slashing Prices by 50%
OpenAI is cutting the cost of running its latest AI models as the company and rival Anthropic increasingly compete to make sophisticated AI agents cheaper to deploy at scale. OpenAI on Tuesday introduced GPT-6 Sol and GPT-6 Luna, two lower-cost additions to its GPT-6 lineup, and said it would cut
[21]
Anthropic, OpenAI Release New Models Amidst The "Pace the Frontier" Debate
The two companies appeared to have pitched for a moratorium around the pace of AI innovation, but that seems to have now gone out of the window A couple of weeks ago, OpenAI and Anthropic were talking about a possible moratorium on AI innovation and the need to cut down the pace of development.
[22]
AI Gets Cheaper: OpenAI Anthropic Target Businesses with New Models
Anthropic and OpenAI have launched cheaper artificial intelligence models within hours of each other, intensifying competition for enterprise customers as businesses demand more affordable AI services. The releases mark a shift in the industry, with companies increasingly focusing on the cost of
[23]
OpenAI launches GPT-6.1 Sol with near-Astra performance By Investing.com
Investing.com -- OpenAI released GPT-6.1 Sol on Tuesday, a new artificial intelligence model that delivers performance close to its GPT-6 Astra model at one-fifth of the cost. The upgraded model charges $2 per million input tokens and $10 per million output tokens, compared to Astra's $10 and $50
[24]
OpenAI launches GPT-6 Sol and Luna: cheaper models now in ChatGPT
OpenAI has rolled out GPT-6 Sol and GPT-6 Luna, two cheaper additions to the GPT-6 lineup, only a few weeks after GPT-6 Astra showed up. The headline is price. OpenAI says both models cost 50% less than the promotional pricing for the comparable GPT-5.6 versions. GPT-6 Sol is priced at $2 per
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OpenAI GPT-6.1 Sol with Astra level AI launched: What's new, pricing, availability and more
OpenAI has recently wrapped its DevDay 2026, and the company introduced the all-new GPT 6.1 Sol. The newly launched model is placed between the GPT-6 Astra and GPT-6 Luna. According to the AI giant, the GPT-6.1 Sol could come close to GPT-6 Astra on several demanding tasks, including coding,
[26]
GPT-6 Astra vs Sol vs Luna: Which One Is for You
OpenAI recently followed a strategy that auto makers have employed for decades by taking one popular model and creating an entire family of models consisting of "sports," "standard," and "budget" variations. Only in their case, performance is measured not by horsepower but by tokens per second and
[27]
OpenAI launches GPT 6 Sol and Luna with Astra-level AI at lower cost, check details
GPT 6 Sol and GPT 6 Luna are available in ChatGPT Work and Codex for Plus, Pro, Business, Enterprise and Edu users. OpenAI has expanded its GPT 6 family with two new models, GPT 6 Sol and GPT 6 Luna. According to the company, the new models will help distribute the benefits of Astra's intelligence
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OpenAI and Anthropic released new high-efficiency AI models that prioritize cost reduction over breakthrough capabilities. GPT-6 Sol and Luna offer 50% lower pricing than predecessors, while Claude Opus 5.5 cuts costs by 40%. The releases signal a strategic shift as both companies target enterprise customers seeking affordable alternatives to expensive frontier models.
OpenAI and Anthropic Compete on Cost, Not Just Capability
OpenAI and Anthropic both released new AI models on Tuesday, marking an intensified focus on cost efficiency rather than groundbreaking capabilities
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. Anthropic announced Claude Opus 5.5, while OpenAI unveiled GPT-6 Sol and GPT-6 Luna. These releases arrive as both companies race to compete with open-weight models and target enterprise customers exploring cheaper alternatives to expensive frontier AI models1
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Source: SiliconANGLE
The competitive releases come just 19 days after OpenAI's GPT-6 Astra debut and 21 days after Anthropic's Fable 5.1 launch, demonstrating an accelerated release cadence despite calls from industry leaders to slow frontier AI development
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. Both companies are preparing for initial public offerings, with Anthropic potentially going public before year-end and OpenAI expected in 20274
.Claude Opus 5.5 Delivers 40% Cost Savings
Claude Opus 5.5 represents Anthropic's effort to catch up with OpenAI's GPT-6 Astra, which had been modestly beating Opus 5 in benchmark comparisons and user sentiment
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. The new model matches Fable 5.1 capabilities while cutting costs by nearly 40% compared to Opus 5 at default settings2
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Source: Decrypt
Token pricing for Claude Opus 5.5 shows significant reductions: input and output tokens cost $4 and $20 per million respectively, representing 20% less than Opus 5
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. Cache reads, which constitute the majority of agentic and coding work costs, dropped to $0.20 per million tokens—60% less than Opus 51
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. The model also generates output more than 30% faster than its predecessor1
.Artificial Analysis placed Claude Opus 5.5 at the top of its Intelligence Index with a score of 58, positioning it on par with GPT-6 Astra for agentic work
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. Anthropic describes it as "the strongest-performing model we've tested to date" in terms of alignment2
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.GPT-6 Sol and Luna Cut Costs by 50%
OpenAI's GPT-6 Sol and GPT-6 Luna deliver substantial improvements in factual accuracy while slashing costs. GPT-6 Sol makes about half as many mistakes as GPT-5.6, while GPT-6 Luna matches GPT-5.6 Sol performance at roughly one-hundredth the cost at higher effort levels
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. These improvements arrived less than three months after the July release of GPT-5.6 models3
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Source: The Next Web
Token pricing for GPT-6 Sol stands at $2 per 1 million input tokens and $10 per 1 million output tokens—50% less than GPT-5.6's promotional pricing of $4 and $20
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. GPT-6 Luna costs $0.10 and $0.50 respectively, down from $0.20 and $1.205
. OpenAI attributes these savings to improvements in caching and inference that reduce computational costs4
.Benchmark comparisons show competitive positioning against Anthropic. On AutomationBench testing business workflows, GPT-6 Sol at xhigh effort outperforms Claude Opus 5 at max effort while costing just 9% as much per task
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. For complex software engineering using DeepSWE 1.1, GPT-6 Sol scored within 1.1 percentage points of Fable 5's highest score at approximately 80% lower cost per task3
.Related Stories
Strategic Shift Toward Enterprise Efficiency
The releases signal a strategic pivot as developers and enterprises focus less on the frontier and more on operationalizing AI cost-effectively
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. Organizations have explored using model orchestration and routers to minimize reliance on expensive frontier models in favor of cheaper alternatives1
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Source: VentureBeat
Both GPT-6 Sol and Luna are rolling out to ChatGPT Work and Codex, with free users and lower-tiered subscribers gaining access to GPT-6 Luna
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. Anthropic is increasing 5-hour usage limits on Pro, Max and Team plans for Claude Opus 5.52
.The rapid pace of improvement remains striking. In less than three months, OpenAI doubled the factual accuracy of its workhorse models while dramatically reducing costs
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. This acceleration continues despite September 2026 calls from Anthropic CEO Dario Amodei echoing employee concerns about slowing frontier AI development4
. Watch for continued competitive pressure on pricing as both companies vie for enterprise budgets ahead of their public offerings, with model orchestration and cost optimization likely becoming as critical as raw capabilities for software tasks and coding tasks alike.References
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