Claude Sonnet 4.5 vs Gemma 4 E2B
Claude Sonnet 4.5 (2025) and Gemma 4 E2B (2026) are frontier reasoning models from Anthropic and Google DeepMind. Claude Sonnet 4.5 ships a 200k-token context window, while Gemma 4 E2B ships a 128k-token context window. On MMMU Pro, Claude Sonnet 4.5 leads by 24.7 pts. This comparison covers specs, pricing, API access, capabilities, benchmarks, input and output token costs, and production fit for coding and agent workloads.
Gemma 4 E2B is safer overall; choose Claude Sonnet 4.5 when reasoning depth matters.
Decision scorecard
Local evidence first| Signal | Claude Sonnet 4.5 | Gemma 4 E2B |
|---|---|---|
| Best for | reasoning-heavy apps, multimodal apps, and tool-calling agents | multimodal apps, tool-calling agents, and provider-routed production |
| Decision fit | Coding, RAG, and Agents | RAG, Agents, and Long context |
| Context window | 200k | 128k |
| Cheapest output | $15/1M tokens | - |
| Provider routes | 8 tracked | 2 tracked |
| Shared benchmarks | MMMU Pro leader | 1 shared |
Decision tradeoffs
- Claude Sonnet 4.5 holds a shared-benchmark lead on MMMU Pro, ahead by 24.7 points.
- Claude Sonnet 4.5 has the larger context window for long prompts, retrieval packs, or transcript analysis.
- Claude Sonnet 4.5 has broader tracked provider coverage for fallback and route flexibility.
- Claude Sonnet 4.5 uniquely exposes Vision, Reasoning, and Structured outputs in local model data.
- Local decision data tags Claude Sonnet 4.5 for Coding, RAG, and Agents.
- Local decision data tags Gemma 4 E2B for RAG, Agents, and Long context.
Monthly cost at traffic
Estimate token spend from the cheapest tracked input and output route or tier on this page.
Claude Sonnet 4.5
$6,150
Cheapest tracked route/tier: Microsoft Foundry
Gemma 4 E2B
Unavailable
No complete token price in local provider data
Cost delta unavailable until both models have sourced input and output token prices.
Switch friction
- Provider overlap exists on GCP Vertex AI and AWS Bedrock; start route-level A/B tests there.
- Check replacement coverage for Vision, Reasoning, and Structured outputs before moving production traffic.
- Provider overlap exists on GCP Vertex AI and AWS Bedrock; start route-level A/B tests there.
- Claude Sonnet 4.5 adds Vision, Reasoning, and Structured outputs in local capability data.
Specs
| Specification | ||
|---|---|---|
| Released | 2025-09-29 | 2026-03-31 |
| Context window | 200k | 128k |
| Parameters | — | 2B |
| Architecture | Decoder Only | - |
| License | Proprietary | Apache 2.0OSI-approved |
| Openness | Proprietary | Open source |
| Weights | Not released | Available |
| Code | Unknown | Unknown |
| Commercial use | Commercial use: conditional | Commercial use: permitted |
| Knowledge cutoff | 2025-12 | 2025-01 |
Pricing and availability
| Pricing attribute | Claude Sonnet 4.5 | Gemma 4 E2B |
|---|---|---|
| Input price |
| - |
| Output price |
| - |
| Providers |
Capabilities
| Capability | Claude Sonnet 4.5 | Gemma 4 E2B |
|---|---|---|
| Vision | Yes | No |
| Multimodal | Yes | Yes |
| Reasoning | Yes | No |
| JSON / Tool use | Yes | Yes |
| Structured outputs | Yes | No |
| Code execution | No | No |
| IDE integration | No | No |
| Computer use | No | No |
| Parallel agents | No | No |
Benchmarks
| Benchmark | Claude Sonnet 4.5 | Gemma 4 E2B |
|---|---|---|
| MMMU Pro | 68.9 | 44.2 |
Continue comparing
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Last reviewed: 2026-07-26. Data sourced from public model cards and provider documentation.