Tech • AI • Robotics • Game
Claude Opus 5.5 Is the Greatest AI Model Ever! Cheaper, Fast, & Powerful! (Fully Tested)
9.3/10TL;DR
Anthropic has launched Claude Opus 5.5, a new flagship model positioned as a major upgrade in coding, computer use and knowledge work, with lower costs and faster performance than Opus 5.
KEY POINTS
Performance jump over Opus 5
Claude Opus 5.5 is described as a substantial step up from Opus 5, particularly in agentic coding, computer use and complex knowledge tasks. It reportedly performs around the level of Claude Fable 5.1 on many tasks while running about 30% faster and costing roughly 40% less per task than Opus 5.
Pricing and speed
Base pricing is listed at $4 per 1 million input tokens and $20 per 1 million output tokens. A fast mode on Claude Code and the broader platform offers up to 2.5x faster speeds, priced at $8 per 1 million input tokens and $40 per 1 million output tokens. The model is still described as token-heavy, meaning large jobs can consume substantial usage despite lower token prices.
Benchmark claims
In coding evaluations, Opus 5.5 is said to outperform frontier rivals including Fable 5.1 and GPT-6 Astra on tests such as Terminal Bench 4.0, while setting new records on Cursor Bench and GPQA Evolve. On OS World, a benchmark for computer-use tasks, it also reportedly posts stronger results than competing models.
Cloud Code usage expansion
Because the model is cheaper to run, Claude Code session limits are being expanded. The 5-hour session limits are increasing by 20%, and users are said to get about 25% more usage within those limits. Plus, Pro, Max and Team tiers also receive a manual reset option for greater flexibility.
Large-scale software work
One cited test involved a 680,000-line code migration completed in less than one day, work that would typically take weeks. Another example said the model optimized 39 of 40 pages of a website without breaking behavior, underscoring its focus on long, multi-step engineering tasks rather than short prompt-response interactions alone.
Game and interactive coding demos
The model has been used to generate full interactive prototypes from a single prompt, including a Mario Kart-style racing game, a Minecraft-like sandbox and a Call of Duty Zombies-style shooter. Reported features included playable characters, sound effects, inventories, purchasable items, animated lighting and environmental interactions, suggesting stronger front-end and gameplay logic generation than earlier models.
Creative code generation
Beyond games, Opus 5.5 reportedly recreated a launch-style animated sequence entirely in code with no external assets, and generated a 13,000-tile animated mosaic from scratch. In another comparison, it produced a more detailed 3D autonomous vehicle model than GPT-6 Astra, including more accurate sensors, shaders and body details.
Cost-quality trade-offs
Higher-quality output can still mean higher total task cost. In one comparison, a detailed volcano island with dinosaurs cost about $3.40 with Opus 5.5, versus $1.60 for Opus 5, but the newer model produced a much richer result, including cutaway underwater scenes, wildlife, vegetation and atmospheric effects. A single high-reasoning SVG generation reportedly consumed 20% to 27% of a $20 plan’s session limit.
Safety and release posture
The launch follows Anthropic’s stated emphasis on carefully pacing frontier deployments. The company says Opus 5.5 underwent testing by outside evaluators including METR and Frontier Design, and that it achieved its strongest alignment evaluation score to date in the firm’s most comprehensive safety review.
CONCLUSION
Claude Opus 5.5 appears to strengthen Anthropic’s position at the top end of the AI market by combining stronger coding and computer-use performance with lower unit pricing. Its main constraint may be heavy token consumption on demanding tasks, which could make it most attractive for complex, high-value work rather than everyday use.
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