Claude Sonnet 4.5 vs Gemma 4 E2B IT
Claude Sonnet 4.5 (2025) and Gemma 4 E2B IT (2026) are frontier reasoning models from Anthropic and Google DeepMind. Claude Sonnet 4.5 ships a 200k-token context window, while Gemma 4 E2B IT ships a 128k-token context window. On MMLU PRO, Claude Sonnet 4.5 leads by 26 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 IT 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 IT |
|---|---|---|
| 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 | Coding, RAG, and Agents |
| Context window | 200k | 128k |
| Cheapest output | $15/1M tokens | - |
| Provider routes | 8 tracked | 2 tracked |
| Shared benchmarks | MMLU PRO leader | 2 shared |
Decision tradeoffs
- Claude Sonnet 4.5 holds a shared-benchmark lead on MMLU PRO, ahead by 26 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 procurement flexibility.
- Claude Sonnet 4.5 uniquely exposes Vision, Reasoning, and Tool use in local model data.
- Local decision data tags Claude Sonnet 4.5 for Coding, RAG, and Agents.
- Local decision data tags Gemma 4 E2B IT 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 Sonnet 4.5
$6,150
Cheapest tracked route/tier: Microsoft Foundry
Gemma 4 E2B IT
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; start route-level A/B tests there.
- Check replacement coverage for Vision, Reasoning, and Tool use before moving production traffic.
- Provider overlap exists on GCP Vertex AI; start route-level A/B tests there.
- Claude Sonnet 4.5 adds Vision, Reasoning, and Tool use 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 |
| 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 IT |
|---|---|---|
| Input price |
| - |
| Output price |
| - |
| Providers |
Capabilities
| Capability | Claude Sonnet 4.5 | Gemma 4 E2B IT |
|---|---|---|
| Vision | Yes | No |
| Multimodal | Yes | Yes |
| Reasoning | Yes | No |
| Function calling | Yes | Yes |
| Tool use | Yes | No |
| Structured outputs | Yes | Yes |
| 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 IT |
|---|---|---|
| MMLU PRO | 86.0 | 60.0 |
| Google-Proof Q&A | 83.4 | 43.4 |
Deep dive
On shared benchmark coverage, MMLU PRO has Claude Sonnet 4.5 at 86 and Gemma 4 E2B IT at 60, with Claude Sonnet 4.5 ahead by 26 points; Google-Proof Q&A has Claude Sonnet 4.5 at 83.4 and Gemma 4 E2B IT at 43.4, with Claude Sonnet 4.5 ahead by 40.0 points. The largest visible gap is 40.0 points on Google-Proof Q&A, which matters most when that benchmark mirrors your workload. Treat isolated benchmark wins as directional, because provider routing, prompt style, and tool access can move real application results.
The capability footprint differs most on vision: Claude Sonnet 4.5, reasoning mode: Claude Sonnet 4.5, and tool use: Claude Sonnet 4.5. Both models share multimodal input, function calling, and structured outputs, so the practical split is not just feature count. Use those differences to decide whether the page is about raw model quality, agentic coding support, multimodal ingestion, or predictable structured API behavior.
Pricing coverage is uneven: Claude Sonnet 4.5 has $3/1M input tokens and Gemma 4 E2B IT has no token price sourced yet. Provider availability is 8 tracked routes versus 2. Treat unknown pricing as an integration gap, then verify the route you will actually call before estimating production spend.
Choose Claude Sonnet 4.5 when reasoning depth, larger context windows, and broader provider choice are central to the workload. Choose Gemma 4 E2B IT when provider fit are more important. For production, rerun your own prompts through the exact provider, region, and tool stack you plan to ship.
FAQ
Which has a larger context window, Claude Sonnet 4.5 or Gemma 4 E2B IT?
Claude Sonnet 4.5 supports 200k tokens, while Gemma 4 E2B IT supports 128k tokens. That gap matters most for long documents, large codebases, retrieval-heavy agents, and conversations where earlier context must remain visible.
Is Claude Sonnet 4.5 or Gemma 4 E2B IT open source?
Claude Sonnet 4.5 is listed under Proprietary. Gemma 4 E2B IT is listed under Apache 2.0. License labels affect whether you can self-host, redistribute weights, or rely only on hosted APIs, so confirm the upstream license before deployment.
Which is better for vision, Claude Sonnet 4.5 or Gemma 4 E2B IT?
Claude Sonnet 4.5 has the clearer documented vision signal in this comparison. If vision is mission-critical, validate it against the provider endpoint because model-level support and API-level exposure can differ.
Which is better for multimodal input, Claude Sonnet 4.5 or Gemma 4 E2B IT?
Both Claude Sonnet 4.5 and Gemma 4 E2B IT expose multimodal input. The better choice depends on benchmark fit, context budget, pricing, and whether your provider route exposes the same capability surface.
Which is better for reasoning mode, Claude Sonnet 4.5 or Gemma 4 E2B IT?
Claude Sonnet 4.5 has the clearer documented reasoning mode signal in this comparison. If reasoning mode is mission-critical, validate it against the provider endpoint because model-level support and API-level exposure can differ.
Where can I run Claude Sonnet 4.5 and Gemma 4 E2B IT?
Claude Sonnet 4.5 is available on Microsoft Foundry, Anthropic, Snowflake Cortex, GCP Vertex AI, and AWS Bedrock. Gemma 4 E2B IT is available on Google AI Studio and GCP Vertex AI. Provider coverage can affect latency, region availability, compliance posture, and fallback options.
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Last reviewed: 2026-06-15. Data sourced from public model cards and provider documentation.