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Favicon for anthropic

Anthropic: Claude Haiku 4.5

anthropic/claude-haiku-4.5

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Claude Haiku 4.5 is Anthropic’s fastest and most efficient model, delivering near-frontier intelligence at a fraction of the cost and latency of larger Claude models. Matching Claude Sonnet 4’s performance across reasoning, coding, and computer-use tasks, Haiku 4.5 brings frontier-level capability to real-time and high-volume applications.

It introduces extended thinking to the Haiku line; enabling controllable reasoning depth, summarized or interleaved thought output, and tool-assisted workflows with full support for coding, bash, web search, and computer-use tools. Scoring >73% on SWE-bench Verified, Haiku 4.5 ranks among the world’s best coding models while maintaining exceptional responsiveness for sub-agents, parallelized execution, and scaled deployment.

Modalities
In / Out Price
$1 / $5per 1M
Context
200K
Released
Oct 15, 2025
Compare
ProvidersPricingPerformanceUptimeBenchmarksAppsActivityFAQExplore

Providers

Different companies host the same model. OpenRouter routes your request to one of them based on the routing mode you pick — Balanced (price + speed), Nitro (fastest), or Floor (cheapest).

Pricing

The average price customers actually pay for this model, next to the prices providers post. Caching and discounts mean the price actually paid is often well below the listed one.

Performance

Throughput is how fast the model writes (tokens per second — higher is better). Latency is total round-trip time (lower is better). TTFT is time-to-first-token — how long before you see anything appear (lower is better).

Uptime

Uptime is the percentage of the past 3 days that at least one provider was responding to requests. Availability is the percentage of time that inference was successfully served. OpenRouter continuously monitors and uses the next-best provider when one returns an error.

Benchmarks

Scores on standardized evaluations and this model’s own outputs on shared benchmark prompts. Higher percentages are better — and each rank shows where this model lands among the models evaluated on that source.

Benchmark score summary for Anthropic: Claude Haiku 4.5 (Artificial Analysis, Design Arena and Vals AI)
SourceBenchmarkScore
Artificial AnalysisClaude 4.5 Haiku (Reasoning) Intelligence Index16.9
Artificial AnalysisClaude 4.5 Haiku (Reasoning) Coding Index43.9
Artificial AnalysisClaude 4.5 Haiku (Reasoning) Math Index83.7
Artificial AnalysisClaude 4.5 Haiku (Reasoning) Agentic Index8.0
Artificial AnalysisClaude 4.5 Haiku (Reasoning) GPQA Diamond67.2%
Artificial AnalysisClaude 4.5 Haiku (Reasoning) HLE10.4%
Artificial AnalysisClaude 4.5 Haiku (Reasoning) IFBench54.3%
Artificial AnalysisClaude 4.5 Haiku (Reasoning) τ²-Bench Telecom54.7%
Artificial AnalysisClaude 4.5 Haiku (Reasoning) AA-LCR74.3%
Artificial AnalysisClaude 4.5 Haiku (Reasoning) τ-Bench Banking9.3%
Artificial AnalysisClaude 4.5 Haiku (Reasoning) GDPval-AA11.6%
Artificial AnalysisClaude 4.5 Haiku (Reasoning) CritPt0.0%
Artificial AnalysisClaude 4.5 Haiku (Reasoning) LiveCodeBench61.5%
Artificial AnalysisClaude 4.5 Haiku (Reasoning) SciCode42.2%
Artificial AnalysisClaude 4.5 Haiku (Reasoning) Terminal-Bench Hard27.3%
Artificial AnalysisClaude 4.5 Haiku (Reasoning) Terminal-Bench 4.00.0%
Artificial AnalysisClaude 4.5 Haiku (Reasoning) Terminal-Bench 2.144.2%
Artificial AnalysisClaude 4.5 Haiku (Reasoning) MMLU-Pro76.0%
Artificial AnalysisClaude 4.5 Haiku (Reasoning) AA-Omniscience Accuracy18.0%
Artificial AnalysisClaude 4.5 Haiku (Reasoning) AA-Omniscience Non-Hallucination Rate72.7%
Artificial AnalysisClaude 4.5 Haiku (Reasoning) AIME 202583.7%
Artificial AnalysisClaude 4.5 Haiku (Non-reasoning) Intelligence Index15.4
Artificial AnalysisClaude 4.5 Haiku (Non-reasoning) Math Index39.0
Artificial AnalysisClaude 4.5 Haiku (Non-reasoning) GPQA Diamond64.6%
Artificial AnalysisClaude 4.5 Haiku (Non-reasoning) HLE4.2%
Artificial AnalysisClaude 4.5 Haiku (Non-reasoning) IFBench42.0%
Artificial AnalysisClaude 4.5 Haiku (Non-reasoning) τ²-Bench Telecom32.5%
Artificial AnalysisClaude 4.5 Haiku (Non-reasoning) AA-LCR49.7%
Artificial AnalysisClaude 4.5 Haiku (Non-reasoning) CritPt0.0%
Artificial AnalysisClaude 4.5 Haiku (Non-reasoning) LiveCodeBench51.1%
Artificial AnalysisClaude 4.5 Haiku (Non-reasoning) Terminal-Bench Hard27.3%
Artificial AnalysisClaude 4.5 Haiku (Non-reasoning) MMLU-Pro80.0%
Artificial AnalysisClaude 4.5 Haiku (Non-reasoning) AA-Omniscience Accuracy14.4%
Artificial AnalysisClaude 4.5 Haiku (Non-reasoning) AA-Omniscience Non-Hallucination Rate74.3%
Artificial AnalysisClaude 4.5 Haiku (Non-reasoning) AIME 202539.0%
Design ArenaClaude Haiku 4.5 Models Arena 3D Elo1069
Design ArenaClaude Haiku 4.5 Models Arena Asciiart Elo1137
Design ArenaClaude Haiku 4.5 Models Arena Code Categories Elo1113
Design ArenaClaude Haiku 4.5 Models Arena Data Visualization Elo1124
Design ArenaClaude Haiku 4.5 Models Arena Game Development Elo1097
Design ArenaClaude Haiku 4.5 Models Arena SVG Elo1022
Design ArenaClaude Haiku 4.5 Models Arena UI Component Elo1095
Design ArenaClaude Haiku 4.5 Models Arena Website Elo1122
Vals AIClaude Haiku 4.5 (Nonthinking) CorpFin v260.3%

Apps

Public apps that send the most traffic to this model. Good signal for what real production workloads look like — and a hint at which use cases this model is best suited for.

Activity

Token volume and request traffic to this model over time.

API

Drop-in code to call this model. OpenRouter's API is OpenAI-compatible — most SDKs work by just swapping the base URL. The only thing that changes between models is the model slug below.

Anthropic: Claude Haiku versions

Available through EU in-region routing

Anthropic: Claude Haiku 4.5 is available through EU in-region routing. Requests sent to eu.openrouter.ai are decrypted in the EU and routed only to shared provider endpoints in Europe (the EU/EEA, the UK, and Switzerland).

Providers in Europe
Amazon Bedrock, Google Vertex
Prices in Europe
  • Amazon Bedrock: $1.10/M tokens input, $5.50/M tokens output
  • Google Vertex: $1.10/M tokens input, $5.50/M tokens output
Base URL
https://eu.openrouter.ai/api/v1
Plan
Requires Business or Enterprise. Self-serve on Business: no contract, no monthly minimum. OpenRouter Business for EU in-region routing

Fails closed: if no shared provider endpoint in Europe is available, the request errors instead of leaving the region. Requests served by your own BYOK key go to your deployment’s region, which you control. In-region routing docs

Explore more models

AI Models with Vision: Multimodal LLMs for Image UnderstandingCollectionAI Model RankingsRanking
Latency / throughput
$1.00$5.00$0.100.47s64 tps
99.94%
$1.00$5.00$0.100.93s74 tps
100.00%
$1.00$5.00$0.100.79s86 tps
99.91%
$1.00$5.00$0.100.55s53 tps
100.00%
Not used in Standard routing:Why these endpoints are not used
$1.10$5.50$0.110.41s75 tps
99.76%
$1.10$5.50$0.112.58s192 tps
100.00%
$1.10$5.50$0.110.75s73 tps
99.70%
$1.10$5.50$0.110.30s85 tps
100.00%
Throughput
192tok/s

P50, best across providers

Latency
0.30s

P50, best provider

AutoExacto benchmarks
GPQA DiamondTAU-BenchGoogle Vertex72.8%67.2%Amazon Bedrock (US)73.1%66.9%Anthropic73.2%66.3%Google Vertex (EU)71.6%67.9%Amazon Bedrock (EU)72.5%66.8%Amazon Bedrock72.9%66.4%Azure73.1%65.6%auto-routing72.7%65.9%Google Vertex (US)72.6%65.1%
Uptime (3d)The model was reachable. Request routed to a provider.
100.00%
Availability (3d)The model returned inference from any provider. Errors and empty responses count against it.
99.79%

Availability over the last 3 days

Last 72 hours
Availability 99.79%
3 Days Ago2 Days AgoYesterdayNow

Availability over the last 24 hours

OpenRouter Availability
99.80%
Without Routing
95.58%

When an error occurs in an upstream provider, we can recover by routing to another healthy provider, if your request filters allow it. You can access per-provider uptime data programmatically through the Endpoints API. Learn more about our load balancing and provider routing options.

1.
Favicon for https://claude.ai/apple-touch-icon.png
Claude Code
Claude Code is Anthropic's agentic coding tool that reads your entire codebase, plans and executes changes across files, runs tests, and iterates on failures, all from natural language prompts.
58.5Btokens
2.
Favicon for https://nousresearch.com
Hermes Agent
Hermes Agent is an open-source, self-improving AI agent by Nous Research that runs persistently with memory across sessions, and builds reusable skills from experience. It comes with 40+ built-in tools, including web search, browser automation, and vision, plus scheduled automations and subagents.
28Btokens
3.
Favicon for https://descript.com/
Descript
AI Video & Podcast Editor
20.4Btokens
4.
Favicon for https://openclaw.ai/
OpenClaw
OpenClaw is an open-source AI agent that connects to your messaging apps and takes real actions on your behalf, from running commands and browsing the web to managing files and sending emails.
15.6Btokens
5.
Favicon for https://revring.ai/
RevRing Max
new
12.4Btokens

Frequently asked questions

Claude Haiku 4.5 is Anthropic’s fastest and most efficient model, delivering near-frontier intelligence at a fraction of the cost and latency of larger Claude models. Matching Claude Sonnet 4’s performance across reasoning, coding, and computer-use tasks, Haiku 4.5 brings frontier-level capability to real-time and high-volume applications.

Claude Haiku 4.5 costs $1.00/M input tokens and $5.00/M output tokens, with separate rates for Cache Read at $0.10/M tokens, Cache Write at $1.25/M tokens, and Cache Write (1h) at $2.00/M tokens.

Claude Haiku 4.5 has a 200,000 token context window. It supports up to 64,000 completion tokens.

Yes. Claude Haiku 4.5 accepts tools and tool_choice for function calling. It also supports structured outputs via a JSON schema in response_format.

Claude Haiku 4.5 accepts text, images, and files such as PDFs as input and returns text.

Claude Haiku 4.5 is served by 4 providers on OpenRouter: Azure, Amazon Bedrock, Google Vertex, and Anthropic. Requests are routed to the best available provider, with automatic failover to the others, and you can pin or exclude providers with provider routing.

Claude Haiku 4.5 was released on October 15, 2025.