Best model for your job # Best AI model for emails > For emails, Claude Opus 5 scores highest on the current data (79.2), weighting writing & preference 60%, instruction following 40%. The cheapest model in the - Canonical page: https://noometry.com/best/for/emails - Last updated: 2026-10-10 - Title: Best AI model for emails (October 2026) | Noometry For emails, Claude Opus 5 scores highest on the current data (79.2), weighting writing & preference 60%, instruction following 40%. The cheapest model in the top 10 is Muse Spark 1.3 at $1.25 / $4.25 per million tokens. Last verified October 10, 2026 Weights: [Writing & Preference](https://noometry.com/best/writing) 60%, [Instruction Following](https://noometry.com/best/instruction-following) 40%. Emails need a natural tone and strict adherence to what you asked for. Best AI model for emails | # | Model | Provider | Fit | Writing & Preference | Instruction Following | Input $/M | Output $/M | | --- | --- | --- | --- | --- | --- | --- | --- | | 1 | [Claude Opus 5](https://noometry.com/models/claude-opus-5) | Anthropic | **79.2** | 79.2 | 79.2 | $5 | $25 | | 2 | [Claude Fable 5.1](https://noometry.com/models/claude-fable-5-1) | Anthropic | **79.2** | 79.2 | 79.2 | $10 | $50 | | 3 | [Claude Opus 5.5](https://noometry.com/models/claude-opus-5-5) | Anthropic | **78.9** | 78.2 | 80.0 | $4 | $20 | | 4 | [Kimi K3](https://noometry.com/models/kimi-k3) (open weights) | Moonshot AI | **77.1** | 76.6 | 77.7 | $3 | $15 | | 5 | [Claude Fable 5](https://noometry.com/models/claude-fable-5) | Anthropic | **77.0** | 75.9 | 78.6 | $10 | $50 | | 6 | [Claude Opus 4.7](https://noometry.com/models/claude-opus-4-7) | Anthropic | **76.4** | 75.1 | 78.4 | $5 | $25 | | 7 | [GLM-5.3](https://noometry.com/models/glm-5-3) (open weights) | Z.ai (Zhipu) | **76.4** | 75.7 | 77.5 | $1.40 | $4.40 | | 8 | [Claude Opus 4.6](https://noometry.com/models/claude-opus-4-6) | Anthropic | **75.9** | 73.5 | 79.5 | $5 | $25 | | 9 | [GPT-6 Astra](https://noometry.com/models/gpt-6-astra) | OpenAI | **75.7** | 75.3 | 76.3 | $10 | $50 | | 10 | [Muse Spark 1.3](https://noometry.com/models/muse-spark-1-3) | Meta | **75.2** | 73.6 | 77.5 | $1.25 | $4.25 | | 11 | [GPT-5.6 Sol](https://noometry.com/models/gpt-5-6-sol) | OpenAI | **75.1** | 73.3 | 77.7 | $4 | $20 | | 12 | [Gemini 4 Argon](https://noometry.com/models/gemini-4-argon) | Google | **74.9** | 71.4 | 80.1 | — | — | | 13 | [Muse Spark 1.1](https://noometry.com/models/muse-spark-1-1) | Meta | **74.7** | 73.4 | 76.5 | $1.25 | $4.25 | | 14 | [GPT-5.5](https://noometry.com/models/gpt-5-5) | OpenAI | **74.6** | 72.7 | 77.5 | $5 | $30 | | 15 | [Gemini 3.8 Flash](https://noometry.com/models/gemini-3-8-flash) | Google | **74.6** | 72.2 | 78.0 | $0.75 | $3.75 | | 16 | [Claude Opus 4.8](https://noometry.com/models/claude-opus-4-8) | Anthropic | **74.2** | 72.0 | 77.4 | $5 | $25 | | 17 | [Muse Spark 1.2](https://noometry.com/models/muse-spark-1-2) | Meta | **74.1** | 72.3 | 76.7 | $1.25 | $4.25 | | 18 | [GPT-5.4](https://noometry.com/models/gpt-5-4) | OpenAI | **74.0** | 71.9 | 77.1 | $2.50 | $15 | | 19 | [Gemini 3.7 Flash](https://noometry.com/models/gemini-3-7-flash) | Google | **73.8** | 71.2 | 77.7 | $0.75 | $3.75 | | 20 | [Claude Sonnet 4.6](https://noometry.com/models/claude-sonnet-4-6) | Anthropic | **73.1** | 70.2 | 77.4 | $3 | $15 | | 21 | [GLM-5.2](https://noometry.com/models/glm-5-2) (open weights) | Z.ai (Zhipu) | **73.0** | 70.4 | 76.9 | $1.40 | $4.40 | | 22 | [GPT-6 Sol](https://noometry.com/models/gpt-6-sol) | OpenAI | **72.9** | 71.9 | 74.5 | $2 | $10 | | 23 | [GPT-5.6 Terra](https://noometry.com/models/gpt-5-6-terra) | OpenAI | **72.7** | 70.2 | 76.4 | $2 | $12 | | 24 | [GPT-5.1](https://noometry.com/models/gpt-5-1) | OpenAI | **72.3** | 64.5 | 83.9 | $1.25 | $10 | | 25 | [Claude Sonnet 5](https://noometry.com/models/claude-sonnet-5) | Anthropic | **72.1** | 69.2 | 76.3 | $2 | $10 | Sponsored placements are available on pages like this one. [Advertise on Noometry](https://noometry.com/advertise) Top two head to head: [Claude Opus 5 vs Claude Fable 5.1](https://noometry.com/compare/claude-fable-5-1-vs-claude-opus-5) ## Frequently asked questions ### What is the best ai model for emails? For emails, Claude Opus 5 scores highest on the current data (79.2), weighting writing & preference 60%, instruction following 40%. The cheapest model in the top 10 is Muse Spark 1.3 at $1.25 / $4.25 per million tokens. ### How is this shortlist built? Emails need a natural tone and strict adherence to what you asked for. 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(2026). Best AI model for emails. Retrieved October 10, 2026, from https://noometry.com/best/for/emails Quote Noometry with a link back to this page. It is also available in [Markdown](https://noometry.com/md/best/for/emails.md).