Claude Haiku 4.5 vs Gemini 3 Flash preview

Claude Haiku 4.5 vs Gemini 3 Flash preview: Gemini 3 Flash preview is cheaper by 50% on average. Claude Haiku 4.5 from Azure AI Foundry (200,000-token context, reasoning, tool calls) vs. Gemini 3 Flash preview from Google Vertex AI (1,048,576-token context, reasoning, tool calls). Use Agent Command Center to A/B both in shadow mode and pick the winner per workload.

Side-by-side cost

Live workload comparison

Same workload run through both models. The cheaper one is highlighted.

3,000
01,048,576
400
065,535
5,000
01,000,000
Azure AI Foundry
$761/mo
Input $1.00/M · Output $5.00/M
Google Vertex AI
$411/mo
Input $0.500/M · Output $3.00/M
At this workload, Gemini 3 Flash preview is 46% cheaper than Claude Haiku 4.5 — a savings of $350/month ($4,200/year).
Production recipe — Agent Command Center
strategy: cost-optimized
primary:
  model: gemini-3-flash-preview
  provider: vertex-ai
fallback:
  model: claude-haiku-4-5
  provider: azure-ai-foundry
shadow: { sample_rate: 0.05 }   # mirror 5% of traffic to compare quality live
Claude Haiku 4.5 Gemini 3 Flash preview
Input price $1.00/M $0.500/M
Output price $5.00/M $3.00/M
Context window 200,000 1,048,576
Max output 64,000 65,535
Function calling
Vision
Audio input
Reasoning
Prompt caching
Structured output
Pricing verified May 12, 2026 May 12, 2026
Cheaper option
~50% cheaper than Claude Haiku 4.5
Larger context
1,048,576 tokens
More capabilities
6 of 6 capability flags advertised

Benchmark comparison

Side-by-side public benchmark scores. Greener bar = winner.

Chatbot Arena ELOgeneral
Claude Haiku 4.5
1,310
Gemini 3 Flash preview
HumanEvalcode
Claude Haiku 4.5
89.5%
Gemini 3 Flash preview
BFCL v3agent
Claude Haiku 4.5
79.3%
Gemini 3 Flash preview
MMLU-Proreasoning
Claude Haiku 4.5
72.4%
Gemini 3 Flash preview
GPQA Diamondreasoning
Claude Haiku 4.5
55.2%
Gemini 3 Flash preview
SWE-bench Verifiedagent
Claude Haiku 4.5
52.0%
Gemini 3 Flash preview