Claude Sonnet 4.5 vs Gemma 4 26B A4B IT
Claude Sonnet 4.5 (2025) and Gemma 4 26B A4B IT (2026) are frontier reasoning models from Anthropic and Google DeepMind. Claude Sonnet 4.5 ships a 200k-token context window, while Gemma 4 26B A4B IT ships a 256k-token context window. On MMLU PRO, Claude Sonnet 4.5 leads by 3.4 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 26B A4B 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 26B A4B 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 | 256k |
| Cheapest output | $15/1M tokens | $0.33/1M tokens |
| Provider routes | 8 tracked | 9 tracked |
| Shared benchmarks | MMLU PRO leader | 2 shared |
Decision tradeoffs
- Claude Sonnet 4.5 holds a shared-benchmark lead on MMLU PRO, ahead by 3.4 points.
- Claude Sonnet 4.5 uniquely exposes Reasoning in local model data.
- Local decision data tags Claude Sonnet 4.5 for Coding, RAG, and Agents.
- Gemma 4 26B A4B IT has the larger context window for long prompts, retrieval packs, or transcript analysis.
- Gemma 4 26B A4B IT has the lower cheapest tracked output price at $0.33/1M tokens.
- Gemma 4 26B A4B IT has broader tracked provider coverage for fallback and route flexibility.
- Local decision data tags Gemma 4 26B A4B 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 26B A4B IT
$131
Cheapest tracked route/tier: OpenRouter
Estimated monthly gap: $6,020. Batch, cache, alternate speed tiers, and negotiated pricing are excluded from this local estimate.
Switch friction
- Provider overlap exists on GCP Vertex AI, OpenRouter, and Vercel AI Gateway; start route-level A/B tests there.
- Gemma 4 26B A4B IT is $14.67/1M tokens lower on cheapest tracked output pricing before cache, batch, or negotiated discounts.
- Check replacement coverage for Reasoning before moving production traffic.
- Provider overlap exists on GCP Vertex AI, OpenRouter, and Vercel AI Gateway; start route-level A/B tests there.
- Claude Sonnet 4.5 is $14.67/1M tokens higher on cheapest tracked output pricing, so quality gains need to justify the spend.
- Claude Sonnet 4.5 adds Reasoning in local capability data.
Specs
| Specification | ||
|---|---|---|
| Released | 2025-09-29 | 2026-03-31 |
| Context window | 200k | 256k |
| Parameters | — | 26B |
| 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 26B A4B IT |
|---|---|---|
| Input price |
| $0.06/1M tokens |
| Output price |
| $0.33/1M tokens |
| Providers |
Capabilities
| Capability | Claude Sonnet 4.5 | Gemma 4 26B A4B IT |
|---|---|---|
| Vision | Yes | Yes |
| Multimodal | Yes | Yes |
| Reasoning | Yes | No |
| JSON / Tool use | Yes | Yes |
| 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 26B A4B IT |
|---|---|---|
| MMLU PRO | 86.0 | 82.6 |
| Google-Proof Q&A | 83.4 | 79.2 |
Continue comparing
Popular comparisons for Claude Sonnet 4.5
Popular comparisons for Gemma 4 26B A4B IT
Last reviewed: 2026-07-26. Data sourced from public model cards and provider documentation.