LLM Reference

Claude Haiku 4.5 vs Claude Opus 4.5

Claude Haiku 4.5 (2025) and Claude Opus 4.5 (2025) are frontier reasoning models from Anthropic. Claude Haiku 4.5 ships a 200k-token context window, while Claude Opus 4.5 ships a 200k-token context window. On SWE-bench Verified, Claude Opus 4.5 leads by 7.6 pts. On pricing, Claude Haiku 4.5 costs $0.80/1M input tokens versus $5/1M for the alternative. This comparison covers specs, pricing, API access, capabilities, benchmarks, input and output token costs, and production fit for coding and agent workloads.

Claude Haiku 4.5 is ~525% cheaper at $0.80/1M; pay for Claude Opus 4.5 only for coding workflow support.

Decision scorecard

Local evidence first
SignalClaude Haiku 4.5Claude Opus 4.5
Best formultimodal apps, tool-calling agents, and provider-routed productionreasoning-heavy apps, multimodal apps, and tool-calling agents
Decision fitCoding, RAG, and AgentsCoding, RAG, and Agents
Context window200k200k
Cheapest output$4/1M tokens$25/1M tokens
Provider routes9 tracked6 tracked
Shared benchmarks2 sharedSWE-bench Verified leader

Decision tradeoffs

Choose Claude Haiku 4.5 when...
  • Claude Haiku 4.5 has the lower cheapest tracked output price at $4/1M tokens.
  • Claude Haiku 4.5 has broader tracked provider coverage for fallback and route flexibility.
  • Local decision data tags Claude Haiku 4.5 for Coding, RAG, and Agents.
Choose Claude Opus 4.5 when...
  • Claude Opus 4.5 holds a shared-benchmark lead on SWE-bench Verified, ahead by 7.6 points.
  • Claude Opus 4.5 uniquely exposes Reasoning in local model data.
  • Local decision data tags Claude Opus 4.5 for Coding, RAG, and Agents.

Monthly cost at traffic

Estimate token spend from the cheapest tracked input and output route or tier on this page.

Lower estimate Claude Haiku 4.5

Claude Haiku 4.5

$1,640

Cheapest tracked route/tier: AWS Bedrock

Claude Opus 4.5

$10,250

Cheapest tracked route/tier: Microsoft Foundry

Estimated monthly gap: $8,610. Batch, cache, alternate speed tiers, and negotiated pricing are excluded from this local estimate.

Switch friction

Claude Haiku 4.5 -> Claude Opus 4.5
  • Provider overlap exists on Microsoft Foundry, Anthropic, and GCP Vertex AI; start route-level A/B tests there.
  • Claude Opus 4.5 is $21/1M tokens higher on cheapest tracked output pricing, so quality gains need to justify the spend.
  • Claude Opus 4.5 adds Reasoning in local capability data.
Claude Opus 4.5 -> Claude Haiku 4.5
  • Provider overlap exists on Microsoft Foundry, Anthropic, and AWS Bedrock; start route-level A/B tests there.
  • Claude Haiku 4.5 is $21/1M tokens lower on cheapest tracked output pricing before cache, batch, or negotiated discounts.
  • Check replacement coverage for Reasoning before moving production traffic.

Specs

Specification
Released2025-10-012025-11-01
Context window200k200k
Parameters——
ArchitectureDecoder OnlyDecoder Only
LicenseProprietaryProprietary
OpennessProprietaryProprietary
WeightsNot releasedNot released
CodeUnknownUnknown
Commercial useCommercial use: conditionalCommercial use: conditional
Knowledge cutoff2025-022025-12

Pricing and availability

Pricing attributeClaude Haiku 4.5Claude Opus 4.5
Input price$0.80/1M tokens$5/1M tokens
Output price$4/1M tokens$25/1M tokens
Providers
Microsoft FoundryAnthropicSnowflake CortexAWS BedrockGCP Vertex AIOpenRouter
Microsoft FoundryAnthropicGCP Vertex AIAWS BedrockOpenRouterVercel AI Gateway

Capabilities

CapabilityClaude Haiku 4.5Claude Opus 4.5
VisionYesYes
MultimodalYesYes
ReasoningNoYes
JSON / Tool useYesYes
Structured outputsYesYes
Code executionYesYes
IDE integrationNoNo
Computer useNoNo
Parallel agentsNoNo

Benchmarks

BenchmarkClaude Haiku 4.5Claude Opus 4.5
SWE-bench Verified73.380.9
BFCL68.777.5

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Last reviewed: 2026-07-26. Data sourced from public model cards and provider documentation.