GLM-5.3-Flash vs Claude Haiku 5.5 vs DeepSeek V4 Flash 0731
Claude Haiku 5.5 comes out ahead, 83 to 79 and 73 on our weighted score, though DeepSeek V4 Flash 0731 is 13% cheaper per token.
Z.ai (Zhipu)GLM-5.3-Flash
79/100- ECI153.2
- Price$0.15 / $0.50
- Context1M
- Our pick
AnthropicClaude Haiku 5.5
83/100- ECI160.4
- Price$0.10 / $0.50
- Context1M
DeepSeekDeepSeek V4 Flash 0731
73/100- ECI154.9
- Price$0.14 / $0.28
- Context1M
Claude Haiku 5.5 is our pick
Claude Haiku 5.5 is the better all-round choice, scoring 83/100 against GLM-5.3-Flash (79) and DeepSeek V4 Flash 0731 (73). It leads on capability. GLM-5.3-Flash wins on inputs & features. DeepSeek V4 Flash 0731 wins on price. The score weighs capability 50%, price 25%, inputs & features 15%, context window 10%.
- CapabilityClaude Haiku 5.5Capabilities Index (ECI): Claude Haiku 5.5 160.4 · DeepSeek V4 Flash 0731 154.9 · GLM-5.3-Flash 153.2
- Lowest priceDeepSeek V4 Flash 0731DeepSeek V4 Flash 0731 $0.175 · Claude Haiku 5.5 $0.20 · GLM-5.3-Flash $0.237 per 1M tokens (3:1 blend)
- Longest contextAbout the sameGLM-5.3-Flash 1,000,000 · Claude Haiku 5.5 1,000,000 · DeepSeek V4 Flash 0731 1,000,000 tokens
- Widest inputsGLM-5.3-FlashGLM-5.3-Flash: Text, Images, PDFs, Video · Claude Haiku 5.5: Text, Images, PDFs · DeepSeek V4 Flash 0731: Text
- Self-hostingGLM-5.3-Flash and DeepSeek V4 Flash 0731Publishes downloadable weights (MIT)
| Measure | Weight | GLM-5.3-Flash | Claude Haiku 5.5 | DeepSeek V4 Flash 0731 |
|---|---|---|---|---|
| CapabilityCapabilities Index (ECI) | 50% | 80 | 89 | 83 |
| Price | 25% | 76 | 80 | 82 |
| Inputs & features | 15% | 90 | 80 | 35 |
| Context window | 10% | 60 | 60 | 60 |
| Overall | 100% | 79/100 | 83/100 | 73/100 |
Every spec in one table
Highlighted cells lead their row. Dashes mean the data is not published.
| Specification | GLM-5.3-FlashZ.ai (Zhipu) | Claude Haiku 5.5Anthropic | DeepSeek V4 Flash 0731DeepSeek |
|---|---|---|---|
| Capability | |||
| Capabilities Index (ECI) | 153.2 | 160.4 (best) | 154.9 |
| ECI rank | #48 of 165 | #14 of 165 (best) | #41 of 165 |
| GPQA DiamondGraduate-level science questions | 90.2% | 89.7% | 91.0% (best) |
| FrontierMath Tiers 1–3Research-level mathematics | 55.8% | 75.1% (best) | 57.5% |
| OTIS Mock AIME 2024–2025Competition mathematics | 93.9% | 98.9% (best) | 94.4% |
| SimpleQA VerifiedShort factual questions | — | 23.8% | 33.6% (best) |
| Price per million tokens | |||
| Input | $0.15 | $0.10 (best) | $0.14 |
| Output | $0.50 | $0.50 | $0.28 (best) |
| Cached input | $0.03 | $0.01 (best) | — |
| Blended (3:1) | $0.237 | $0.20 | $0.175 (best) |
| Long-context rate | Same rate | Over 100K: $0.50 / $2.50 | Same rate |
| Price source | Official Z.AI API | Official Anthropic API | Median of 51 providers |
| Limits | |||
| Context window | 1,000,000 tokens | 1,000,000 tokens | 1,000,000 tokens |
| Max output | 131,072 tokens | 128,000 tokens | 384,000 tokens (best) |
| Inputs and features | |||
| Text | Yes | Yes | Yes |
| Images | Yes | Yes | No |
| PDFs | Yes | Yes | No |
| Audio | No | No | No |
| Video | Yes | No | No |
| Reasoning | Yeslow · high · max | Yeslow · medium · high · xhigh · max | Yes |
| Tool calling | Yes | Yes | Yes |
| Structured output | Yes | Yes | No |
| Availability | |||
| Weights | Open | Proprietary | OpenMIT |
| API model ID | glm-5.3-flash | claude-haiku-5-5 | — |
| API providers | 80 (best) | 33 | 52 |
| Released | Aug 26, 2026 | Oct 7, 2026 | Jul 31, 2026 |
| Knowledge cutoff | — | Jun 2026 | May 2025 |
What would a month cost?
Enter your expected volume in millions of tokens. List prices only; caching and batch discounts would lower these.
- GLM-5.3-Flash$2.50
- Claude Haiku 5.5$2.00
- DeepSeek V4 Flash 0731$1.96
Which should you choose?
Which is better: GLM-5.3-Flash, Claude Haiku 5.5 or DeepSeek V4 Flash 0731?
Claude Haiku 5.5 is the better all-round choice, scoring 83/100 against GLM-5.3-Flash (79) and DeepSeek V4 Flash 0731 (73). It leads on capability. GLM-5.3-Flash wins on inputs & features. DeepSeek V4 Flash 0731 wins on price. The score weighs capability 50%, price 25%, inputs & features 15%, context window 10%.
Which is cheaper, GLM-5.3-Flash, Claude Haiku 5.5 or DeepSeek V4 Flash 0731?
DeepSeek V4 Flash 0731 is cheaper at $0.14 input / $0.28 output per million tokens (median across 51 API providers). Claude Haiku 5.5 costs $0.10 input / $0.50 output per million tokens (official Anthropic API price); GLM-5.3-Flash costs $0.15 input / $0.50 output per million tokens (official Z.AI API price). At a typical mix of three input tokens to one output token, that is $0.175 per million tokens for DeepSeek V4 Flash 0731 versus $0.20 for Claude Haiku 5.5 (1.1× as much) and $0.237 for GLM-5.3-Flash (1.4× as much).
Which scores higher on benchmarks?
Claude Haiku 5.5 scores higher on the Capabilities Index (ECI): Claude Haiku 5.5 160.4 (#14 of 165), DeepSeek V4 Flash 0731 154.9 (#41 of 165) and GLM-5.3-Flash 153.2 (#48 of 165). Their confidence ranges do not overlap (157.3–163.8 vs 152.6–156.8), so the gap is a real one. On individual benchmarks: GPQA Diamond — DeepSeek V4 Flash 0731 91.0%, GLM-5.3-Flash 90.2%, Claude Haiku 5.5 89.7%; FrontierMath Tiers 1–3 — Claude Haiku 5.5 75.1%, DeepSeek V4 Flash 0731 57.5%, GLM-5.3-Flash 55.8%; OTIS Mock AIME 2024–2025 — Claude Haiku 5.5 98.9%, DeepSeek V4 Flash 0731 94.4%, GLM-5.3-Flash 93.9%.
Which is better for coding?
There are no published SWE-bench Verified results for GLM-5.3-Flash, Claude Haiku 5.5 and DeepSeek V4 Flash 0731 yet, so there is no like-for-like coding score. On overall capability, Claude Haiku 5.5 leads, which tends to carry over to coding, but test on your own codebase. All three support tool calling for agent workflows.
Which has the bigger context window?
GLM-5.3-Flash, Claude Haiku 5.5 and DeepSeek V4 Flash 0731 share the same 1,000,000-token context window. Maximum output per response: GLM-5.3-Flash up to 131,072, Claude Haiku 5.5 up to 128,000, DeepSeek V4 Flash 0731 up to 384,000 tokens.
Which can read images, PDFs, audio or video?
GLM-5.3-Flash accepts text, images, PDFs and video; Claude Haiku 5.5 accepts text, images and PDFs; DeepSeek V4 Flash 0731 accepts text. GLM-5.3-Flash handles the widest range of inputs.
Are any of these open source?
GLM-5.3-Flash and DeepSeek V4 Flash 0731 publishes its weights (MIT) and can be self-hosted; Claude Haiku 5.5 is proprietary.
Which is newer?
Claude Haiku 5.5 is the newest, released Oct 7, 2026. GLM-5.3-Flash came out Aug 26, 2026; DeepSeek V4 Flash 0731 came out Jul 31, 2026. Knowledge cutoff: Claude Haiku 5.5 Jun 2026, DeepSeek V4 Flash 0731 May 2025.
How do you decide the winner?
Each model gets a 0–100 score on capability (50%, independent benchmark results); price (25%, blended price per million tokens (3 input : 1 output), log scale); inputs & features (15%, image, PDF, audio and video input, tool calling, structured output and reasoning); context window (10%, maximum tokens per request, log scale). Dimensions missing for any model are dropped and the remaining weights rescaled, so every model is judged on the same evidence. Specs and prices come from public model listings and the labs’ own API pages; capability scores come from independent benchmark runs. Data updated Nov 2, 2026.
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