Uptimeby GlyphClaude API Priority Tier SLA
Anthropic · AI models · promises up to 99.5% · checked 47d ago
18 major outages in the last 365 days: 4.3 d counted, 98.809% observed against the 99.5% Priority Tier (existing commitments only).
4 of 12 months fell below it (credits are claimed per month).
Last 90 days: 69 min counted, 99.946% observed.
Incidents, last 365 days
Elevated errors for Claude Sonnet 5.5
A partial outage or slowdown on claude.ai, Claude API (api.anthropic.com), Claude Code and 1 more for 41 min, not counted as downtime.
13 days ago
Elevated errors for Claude Sonnet 5.5A partial outage or slowdown on claude.ai, Claude API (api.anthropic.com), Claude Code and 1 more for 42 min, not counted as downtime.
13 days ago
Elevated errors for Claude Fable 5.1A partial outage or slowdown on claude.ai, Claude API (api.anthropic.com), Claude Code and 1 more for 32 min, not counted as downtime.
2 weeks ago
Elevated errors for Claude Sonnet 5.5 and other modelsA partial outage or slowdown on claude.ai, Claude API (api.anthropic.com), Claude Code and 1 more for 99 min, not counted as downtime.
2 weeks ago
Elevated errors for Claude Fable 5 and Claude Fable 5.1A partial outage or slowdown on claude.ai, Claude API (api.anthropic.com), Claude Code and 1 more for 37 min, not counted as downtime.
2 weeks ago
Elevated errors for Claude Opus 5.5A partial outage or slowdown on claude.ai, Claude API (api.anthropic.com), Claude Code and 1 more for 6 min, not counted as downtime.
2 weeks ago
Elevated errors for Claude Fable 5.1, Sonnet 5.5, and Haiku 5.5A major outage on claude.ai, Claude API (api.anthropic.com), Claude Code and 1 more for 34 min, counted as downtime.
2 weeks ago
Degraded performance for Claude Fable 5A minor incident on claude.ai, Claude API (api.anthropic.com), Claude Code and 1 more for 40 min, not counted as downtime.
2 weeks ago
Elevated errors for Claude Opus 5.5A partial outage or slowdown on claude.ai, Claude API (api.anthropic.com), Claude Code and 1 more for 19 min, not counted as downtime.
4 weeks ago
Elevated errors for Claude Mythos 5.1 and Claude Fable 5.1A partial outage or slowdown on claude.ai, Claude API (api.anthropic.com), Claude Code and 1 more for 16 min, not counted as downtime.
5 weeks ago
Delayed credits on the Claude PlatformA minor incident on Claude Console (platform.claude.com), Claude API (api.anthropic.com) for 6.3 h, not counted as downtime.
5 weeks ago
Elevated errors on claude.ai, Claude Code, Claude Cowork and the Claude APIA partial outage or slowdown on claude.ai, Claude Console (platform.claude.com), Claude API (api.anthropic.com) and 2 more for 2.1 h, not counted as downtime.
5 weeks ago
Elevated errors for multiple modelsA partial outage or slowdown on claude.ai, Claude API (api.anthropic.com), Claude Code and 1 more for 98 min, not counted as downtime.
6 weeks ago
Intermittent error spikes for Claude Mythos 5.1 and Claude Fable 5.1A partial outage or slowdown on claude.ai, Claude API (api.anthropic.com), Claude Code and 1 more for 86 min, not counted as downtime.
7 weeks ago
Elevated errors for Claude Mythos 5.1 and Claude Fable 5.1A partial outage or slowdown on claude.ai, Claude API (api.anthropic.com), Claude Code and 1 more for 17 min, not counted as downtime.
8 weeks ago
Elevated latency on the Claude API for some usersA minor incident on Claude API (api.anthropic.com), Claude Cowork for 1.7 h, not counted as downtime.
2 months ago
Elevated errors for multiple modelsA partial outage or slowdown on claude.ai, Claude API (api.anthropic.com), Claude Code and 1 more for 3 h, not counted as downtime.
2 months ago
Elevated errors for Claude Sonnet 5A partial outage or slowdown on claude.ai, Claude API (api.anthropic.com), Claude Code and 1 more for 19 min, not counted as downtime.
2 months ago
Elevated errors for Claude Sonnet 5A partial outage or slowdown on claude.ai, Claude API (api.anthropic.com), Claude Code and 1 more for 26 min, not counted as downtime.
2 months ago
Elevated errors for multiple modelsA partial outage or slowdown on claude.ai, Claude API (api.anthropic.com), Claude Code and 1 more for 3.4 h, not counted as downtime.
2 months ago
Elevated errors on requests to multiple modelsA partial outage or slowdown on claude.ai, Claude API (api.anthropic.com), Claude Code and 1 more for 26 min, not counted as downtime.
2 months ago
Elevated errors on Google connectorsA minor incident on claude.ai, Claude API (api.anthropic.com), Claude Code and 1 more for 29 min, not counted as downtime.
2 months ago
Degraded performance for Claude Opus 5 and Claude Haiku 4.5A minor incident on claude.ai, Claude API (api.anthropic.com), Claude Code and 1 more for 80 min, not counted as downtime.
2 months ago
Degraded performance for multiple modelsA minor incident on claude.ai, Claude API (api.anthropic.com), Claude Code and 1 more for 2.7 h, not counted as downtime.
2 months ago
Degraded performance for Claude Opus 5, Claude Sonnet 5A minor incident on claude.ai, Claude API (api.anthropic.com), Claude Code and 1 more for 93 min, not counted as downtime.
2 months ago
Latest 25 of 60.
Major outage time per month
Allowed per month: 3.6 h
Commitments and credits
Priority Tier (existing commitments only)
Organizations with an existing Priority Tier capacity commitment (input TPM + output TPM, 1/3/6/12 months, specific model). No longer sold.
Credit: No credit schedule published
SLA changes
Claude API Priority Tier
Updated model support list and clarified service tier descriptions.
2 weeks agoPage
Claude API Priority Tier
Priority Tier moved from a purchasable offer ('Get started with Priority Tier ... Higher availability: Target 99.5% uptime', still present in the 2025-11-11 snapshot) to 'no longer available for purchase' for new commitments. The 99.5% target is unchanged. Exact change date unknown; after 2025-11-11, observed 2026-09-23.
6 weeks agoSource
More in ai models
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Observed 98.805% over 365 days
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Observed 98.757% over 365 days
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Observed 100% over 365 days
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Google publishes no SLA for it; its status page has no history this site can read.
Google Cloud promises 99.5% uptime, with a 10% credit when it misses; its status page showed no major outage in the 252 days on file.
Observed 100% over 365 days
Google Cloud promises 99.9% uptime, with a 10% credit when it misses; its status page showed no major outage in the 252 days on file.
Observed 100% over 365 days
Claude API (Standard tier)Anthropic publishes no SLA for it; its status page showed 4.4 d of major outage in the last year.NoneFirst creditn/aObserved 365d98.805%All incidents 92.395%
Cohere API (SaaS: Command, Embed, Rerank)Cohere publishes no SLA for it; its status page showed no major outage in the last year.NoneFirst creditn/aObserved 365d100%All incidents 99.989%
Gemini API (Google AI Studio)Google publishes no SLA for it; its status page has no history this site can read.NoneFirst creditn/aObserved 365dNo feed
Gemini API on Vertex AIGoogle Cloud promises 99.5% uptime, with a 10% credit when it misses; its status page showed no major outage in the 252 days on file.99.5%First credit10%Observed 365d100%All incidents 99.467%
Terms, exclusions and sources
- Measured
- Stated as a target, not a contractual SLA; measurement window not published.
- Not covered
- Target only; no service-credit schedule published; Requests beyond committed capacity fall back to standard tier; Not supported on Claude Fable 5.1, Mythos 5.1/5/Preview, Opus 5.5, Opus 5, Sonnet 5; Requests exceeding regular rate limits are declined
- Status history
- Status history since Sep 22, 2025
- Weighted uptime
- All incidents, weighted: 92.395% · Downtime
Priority Tier targets 99.5% uptime with prioritized computational resources. Requests beyond your committed capacity automatically fall back to standard tier.
Page banner (fetched 2026-09-23): 'Priority Tier capacity commitments are no longer available for purchase. Organizations with an existing commitment can continue to use Priority Tier through their contract end date'. For guaranteed capacity it points to contact sales. The 99.5% figure is worded as a target, not an SLA with credits.