Claude Haiku 4.5 vs Gemini 3 Pro
Claude Haiku 4.5 (2025) and Gemini 3 Pro (2025) are general-purpose language models from Anthropic and Google DeepMind. Claude Haiku 4.5 ships a 200k-token context window, while Gemini 3 Pro ships a 1m-token context window. On SWE-bench Verified, Gemini 3 Pro leads by 2.9 pts. 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 ~56% cheaper at $0.80/1M; pay for Gemini 3 Pro only for coding workflow support.
Decision scorecard
Local evidence first| Signal | Claude Haiku 4.5 | Gemini 3 Pro |
|---|---|---|
| Best for | multimodal apps, tool-calling agents, and provider-routed production | multimodal apps, tool-calling agents, and long-context analysis |
| Decision fit | Coding, RAG, and Agents | Coding, RAG, and Agents |
| Context window | 200k | 1m |
| Cheapest output | $4/1M tokens | $5/1M tokens |
| Provider routes | 9 tracked | 2 tracked |
| Shared benchmarks | 2 shared | SWE-bench Verified leader |
Decision tradeoffs
- 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.
- Claude Haiku 4.5 uniquely exposes Structured outputs in local model data.
- Local decision data tags Claude Haiku 4.5 for Coding, RAG, and Agents.
- Gemini 3 Pro holds a shared-benchmark lead on SWE-bench Verified, ahead by 2.9 points.
- Gemini 3 Pro has the larger context window for long prompts, retrieval packs, or transcript analysis.
- Local decision data tags Gemini 3 Pro 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.
Claude Haiku 4.5
$1,640
Cheapest tracked route/tier: AWS Bedrock
Gemini 3 Pro
$2,250
Cheapest tracked route/tier: GCP Vertex AI
Estimated monthly gap: $610. Batch, cache, alternate speed tiers, and negotiated pricing are excluded from this local estimate.
Switch friction
- Provider overlap exists on Replicate API and GCP Vertex AI; start route-level A/B tests there.
- Gemini 3 Pro is $1/1M tokens higher on cheapest tracked output pricing, so quality gains need to justify the spend.
- Check replacement coverage for Structured outputs before moving production traffic.
- Provider overlap exists on GCP Vertex AI and Replicate API; start route-level A/B tests there.
- Claude Haiku 4.5 is $1/1M tokens lower on cheapest tracked output pricing before cache, batch, or negotiated discounts.
- Claude Haiku 4.5 adds Structured outputs in local capability data.
Specs
| Specification | ||
|---|---|---|
| Released | 2025-10-01 | 2025-12-11 |
| Context window | 200k | 1m |
| Parameters | — | — |
| Architecture | Decoder Only | Decoder Only |
| License | Proprietary | Proprietary |
| Openness | Proprietary | Proprietary |
| Weights | Not released | Not released |
| Code | Unknown | Unknown |
| Commercial use | Commercial use: conditional | Commercial use: conditional |
| Knowledge cutoff | 2025-02 | 2025-01 |
Pricing and availability
| Pricing attribute | Claude Haiku 4.5 | Gemini 3 Pro |
|---|---|---|
| Input price | $0.80/1M tokens | $1.25/1M tokens |
| Output price | $4/1M tokens | $5/1M tokens |
| Providers |
Capabilities
| Capability | Claude Haiku 4.5 | Gemini 3 Pro |
|---|---|---|
| Vision | Yes | Yes |
| Multimodal | Yes | Yes |
| Reasoning | No | No |
| JSON / Tool use | Yes | Yes |
| Structured outputs | Yes | No |
| Code execution | Yes | Yes |
| IDE integration | No | No |
| Computer use | No | No |
| Parallel agents | No | No |
Benchmarks
| Benchmark | Claude Haiku 4.5 | Gemini 3 Pro |
|---|---|---|
| SWE-bench Verified | 73.3 | 76.2 |
| BFCL | 68.7 | 72.5 |
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Last reviewed: 2026-09-21. Data sourced from public model cards and provider documentation.