Elon Musk announced that Grok Bot will begin using outside AI models, including Claude Opus 5.5, Midjourney, and Suno, choosing whichever model is best for each task.
Kiro has made Anthropic’s Claude Opus 5.5 available in the Kiro IDE, CLI, and Crew. Kiro says it matches Fable 5.1 on most work and costs 40% less than Opus 5.
Arena.ai places Anthropic’s Claude Opus 5.5 (High) second in Agent Arena with a +12.15% net improvement. Only Fable 5.1 (Max) ranks higher, and Arena.ai puts the median price at $1.31 per task, 64% less.
Arena.ai says Claude Opus 5.5 (Max) leads its Code Arena WebDev ranking at a blended $16 per million tokens, 60% below the price of the next-ranked model, GPT-6 Astra (Max). Scores are based on live use by Arena.ai’s global community.
Arena.ai says Claude Opus 5.5 (Max) delivers top performance at a blended $16 per million tokens, and describes that price-performance point as reshaping the Pareto frontier.
Arena.ai places Claude Opus 5.5 (Max) first in Code Arena WebDev at 1,818 points, 26 ahead of GPT-6 Astra (Max) and 126 above Opus 5 (Max). Claude says the model matches Claude Fable 5.1 on most tasks and costs 40% less to run than Opus 5.
Artificial Analysis says Claude Opus 5.5 uses 15.6 million tokens per Coding Agent Index task, compared with 11.4 million for Opus 5. Cached input rises from 10.9 million to 14.6 million, and output more than doubles from 137,000 to 333,000.
At max effort in Claude Code, Artificial Analysis measures Opus 5.5 at 66, above Opus 5 at 60 and Claude Fable 5.1 at 62. Its cost per task is $13.04, higher than Opus 5’s $10.79 despite lower token prices.
B.AI now offers Claude Opus 5.5. According to B.AI, the model supports a 1M-token context and up to 128K output, matches Claude Fable 5.1 on most tasks, and costs about 40% less to run than Opus 5.
The estimate is close to $5.86 for Opus 5 (max). Higher token use is offset by a 20% base-price cut and a further reduction in cache-read pricing to $0.20.
Glean says Claude Opus 5.5 cuts token costs by 50% versus its predecessor on Glean's own evaluations, and that GPT-6 Luna and GPT-6 Sol each cost 50% less than their predecessors.
Databricks is making OpenAI’s GPT-6 Sol and GPT-6 Luna and AnthropicAI’s Claude Opus 5.5 available to its customers. Databricks says the GPT-6 models perform strongly at lower cost with a higher Pareto frontier on OfficeQA Pro, and that Claude Opus 5.5 improves cost efficiency on enterprise document parsing.
Claude says Claude Opus 5.5 is available today. The statement was posted at 18:55 UTC on September 22, 2026, and gives no platform, price, quota, or eligibility terms.
Command Code now offers Claude Opus 5.5 in Command Code Max and through its API. No pricing, quota, or other access conditions were stated.
Arena.ai has added Claude Opus 5.5 to Agent Arena and to Battle Mode for WebDev, Text, Vision, and Document. Claude says it is the first Claude 5.5 model, performs at the level of Claude Fable 5.1 for most tasks, and costs 40% less to run than Opus 5.
AnthropicAI's Claude Opus 5.5 is generally available in GitHub Copilot for agentic coding, long-running agentic tasks, and knowledge work. GitHub's early testing found task resolution comparable to Claude Opus 5, with significantly fewer steps and tokens and fast error recovery on multistep tasks.
Cursor says the model is the new top result on CursorBench at 57.8% (Max) and costs 40% less per task than Opus 5.
Claude says Opus 5.5 performs at the level of Claude Fable 5.1 for most tasks and costs 40% less to run than Opus 5. Pi says users who want it in Pi can wait or run pi update --models.
Perplexity has made Claude Opus 5.5 available as the Standard effort level in Perplexity Computer. On Perplexity’s WANDR benchmark, it scored 0.610 at $4.13 per task, slightly outperforming Claude Fable 5.1 while costing 67.6% less per task.
