ModelRefs / Claude 3.5 Haiku - AI model implementation reference

Claude 3.5 Haiku - AI model implementation reference

Claude 3.5 Haiku is a retired Anthropic model, intended in its time for faster language, coding, and tool-use workloads than larger Claude tiers of its generation. Anthropic's model deprecations page lists claude-3-5-haiku-20241022 as deprecated on 19 December 2025 and retired on 19 February 2026, with Claude Haiku 4.5 as the recommended replacement. Those dates apply to Anthropic-operated platforms; Amazon Bedrock and Google Cloud set their own retirement schedules.

Overview

Claude 3.5 Haiku is attributed to Anthropic in ModelRefs' canonical registry. Tracked modalities: Text input and output, Image support depends on the documented channel. Primary use cases considered on ModelRefs: High-volume language processing and classification; Latency-sensitive assistants, coding, and tool workflows.

This ModelRefs profile is decision-support material, not a final or universal ranking. Confirm current behavior, access, pricing, limits, licensing, and lifecycle in Anthropic's own documentation, and evaluate Claude 3.5 Haiku on representative workloads before implementation.

Lifecycle

Retired. No longer served. Requests to it fail rather than falling back.

Deprecated: 19 December 2025
Stopped serving: 19 February 2026
Provider's replacement: claude-haiku-4-5-20251001
Applies to: Anthropic-operated platforms (Claude API, Claude Platform on AWS, Microsoft Foundry); Amazon Bedrock and Google Cloud set their own retirement schedules.

Provider-documented snapshots

claude-3-5-haiku-20241022

Source: platform.claude.com, checked 2026-10-16.

Benchmark & Evaluation

ModelRefs currently has partial, narrow benchmark coverage for Claude 3.5 Haiku. Treat the available benchmark evidence as one input to the decision, not a guarantee that Claude 3.5 Haiku is the strongest option for your workload, and evaluate it on representative workloads before selecting it.

Provider-reported benchmark results should be interpreted with methodology, dataset, prompting, tool, sampling, and recency limitations in mind.
G.18 registers Anthropic's model-card GPQA Diamond result for Claude 3.5 Haiku (October 2024). It supports Partial eligibility only and remains provider-reported.

Implementation considerations

Do not infer larger-tier quality from the Claude family name.
Requests to claude-3-5-haiku-20241022 fail on Anthropic-operated platforms; evaluate Claude Haiku 4.5 directly rather than carrying over 3.5 Haiku latency or tool-behavior assumptions.
Retired on Anthropic-operated platforms (Claude API, Claude Platform on AWS, Microsoft Foundry) since 19 February 2026; requests to a retired model ID fail rather than falling back.
Amazon Bedrock and Google Cloud publish their own model tables and retirement schedules, so availability there must be checked separately.
Model identifiers, image support, and regional coverage differed by channel, so historical integrations are not directly comparable.

Risks and limitations

Outputs can be incorrect or unsuitable for the intended task; use task-specific evaluation, grounding, and human review where consequences are material.
API availability, model aliases, rate limits, data controls, regions, and prices are mutable and differ by product channel.

Source coverage

ModelRefs reviewed Anthropic's published material on 2026-06-29. Model behavior, access, pricing, limits, and lifecycle can change, so verify the linked provider documentation before implementation. What remains open is recorded on this page: Channel-specific modality support was not fully mirrored here, and partner-platform retirement dates need separate verification. Fit and comparison signals remain provisional until tested on your own workload.

Sources

Continue your research

Use these connected ModelRefs sections to compare alternatives, inspect implementation paths, and review the evidence and governance boundaries relevant to Claude 3.5 Haiku - AI model implementation reference.