Releasesby GlyphClaude Fable 5.2 and Claude Mythos 5.2 enforce the prefix check for every account, whatever its age
Claude Fable 5.2 and Claude Mythos 5.2 enforce the prefix check for every account, whatever its age. Claude Fable 5.1 returns the error by default on accounts created on or after August 31, 2026 (see When prefix_mismatch_behavior is unset).
Also shipped Nov 9, 2026Anthropic in November 2026 →
The following AlloyDB AI features and improvements are generally available ( GA ): - Smart batching for AI...
The following AlloyDB AI features and improvements are generally available ( GA ): Smart batching for AI functions: AI function acceleration is generally available for ai.if , ai.rank , ai.analyze_sentiment , ai.summarize , ai.extract , ai.classify , and ai.generate on AlloyDB clusters running PostgreSQL 17 and later.
To support your FinOps practices, you can now opt in to compute cost attribution in BigQuery editions
To support your FinOps practices, you can now opt in to compute cost attribution in BigQuery editions. This feature attributes billed compute charges directly to the query projects that use your administration project's reservation capacity.
Query performance troubleshooting and job and system performance comparison in the BigQuery jobs explorer are...
Query performance troubleshooting and job and system performance comparison in the BigQuery jobs explorer are generally available (GA). For more information, see Troubleshoot job performance and Diagnose performance regressions by comparing jobs and systems .
When you create or schedule a pipeline, you can specify the maximum number of concurrently executed pipeline...
When you create or schedule a pipeline, you can specify the maximum number of concurrently executed pipeline tasks. This feature is generally available (GA).
You can use compression functions in GoogleSQL to compress or decompress bytes or string values by using the...
You can use compression functions in GoogleSQL to compress or decompress bytes or string values by using the Zstandard (Zstd) lossless data compression algorithm. The following functions are supported: ZSTD_COMPRESS ZSTD_DECOMPRESS_TO_BYTES ZSTD_DECOMPRESS_TO_STRING These functions are in Preview .
Fast mode for Anthropic Claude models is generally available
Fast mode for supported Anthropic Claude models, starting with Claude Fable 5.2 ( claude-fable-5-2 ), is available in General Availability (GA) . You can set "speed": "fast" in online pay-as-you-go prediction requests to accelerate output token generation for latency-sensitive agentic workflows.
More from Claude PlatformEvery Claude Platform release →
We’ve launched Claude Fable 5.2 (claude-fable-5-2), built for demanding reasoning and long-horizon agentic
We’ve launched Claude Fable 5.2 (claude-fable-5-2), built for demanding reasoning and long-horizon agentic work. Claude Mythos 5.2 (claude-mythos-5-2) offers the same capabilities only to organizations verified through Anthropic’s verification programs, such as the Cyber Verification Program.
On the Claude API and Claude Models on Google Cloud (Google managed), a conversation that moves onto Claude
On the Claude API and Claude Models on Google Cloud (Google managed), a conversation that moves onto Claude Fable 5.2 or Claude Mythos 5.2 keeps the reasoning from other models, including Claude Opus 5.5, Claude Sonnet 5.5, and Claude Haiku 5.5.
Claude Fable 5.2 and Claude Mythos 5.2 support computer use through the computer_toolset_20260801 toolset
Claude Fable 5.2 and Claude Mythos 5.2 support computer use through the computer_toolset_20260801 toolset. A request that declares the earlier computer_20251124 tool returns a 400 error on every platform except Amazon Bedrock, where the earlier tool still works. See Migrate from computer_20251124.
With the advisor tool, which is in beta, a Claude Fable 5.2 or Claude Mythos 5.2 executor accepts only Claude
With the advisor tool, which is in beta, a Claude Fable 5.2 or Claude Mythos 5.2 executor accepts only Claude Fable 5.2 or Claude Mythos 5.2 as its advisor. Any other advisor returns a 400 error, so set the advisor’s model to one of these two models when you move an executor to them. Every executor model accepts Claude Fable 5.2 as its advisor.
Both models require 30-day data retention, like Claude Fable 5.1 and Claude Mythos 5.1
Both models require 30-day data retention, like Claude Fable 5.1 and Claude Mythos 5.1. They aren’t available under zero data retention unless expressly authorized by Anthropic. See Model-specific data retention requirements.
Thinking blocks that Claude Fable 5.2 and Claude Mythos 5.2 produce work only in the account that produced
Thinking blocks that Claude Fable 5.2 and Claude Mythos 5.2 produce work only in the account that produced them, or in an account linked to it. See Preserved thinking.
We’ve launched fast mode for Claude Fable 5.2 in Messages API requests on the Claude API
We’ve launched fast mode for Claude Fable 5.2 in Messages API requests on the Claude API. Fast mode delivers up to 2.5x higher output tokens per second, at $16 USD per MTok of input and $80 USD per MTok of output. Set speed: "fast" on your request, with no beta header.
Claude Console IP allowlisting is in beta
Anthropic introduced IP allowlisting for organizations in the Claude Console. Administrators can restrict API key usage to specific IPv4 and IPv6 addresses or CIDR ranges.