Inkling vs GPT-5.4 mini vs Kimi K2.7 Code
Too close to call on our weighted score (Kimi K2.7 Code 63, Inkling 63, GPT-5.4 mini 62). The right pick depends on what you value most.
Thinking MachinesInkling
63/100- ECI148.5
- Price$1.00 / $4.05
- Context1.05M
OpenAIGPT-5.4 mini
62/100- ECI148.8
- Price$0.75 / $4.50
- Context400K
Moonshot AIKimi K2.7 Code
63/100- ECI150.2
- Price$0.95 / $4.00
- Context262K
Too close to call
It is close. Our weighted score puts them within a point (Kimi K2.7 Code 63/100, Inkling 63/100, GPT-5.4 mini 62/100), so choose by what matters most for your work: Kimi K2.7 Code for raw capability, GPT-5.4 mini on price and Inkling for long inputs. The score weighs capability 50%, price 25%, inputs & features 15%, context window 10%.
- CapabilityKimi K2.7 CodeCapabilities Index (ECI): Kimi K2.7 Code 150.2 · GPT-5.4 mini 148.8 · Inkling 148.5
- Lowest priceGPT-5.4 miniGPT-5.4 mini $1.69 · Kimi K2.7 Code $1.71 · Inkling $1.76 per 1M tokens (3:1 blend)
- Longest contextInklingInkling 1,048,576 · GPT-5.4 mini 400,000 · Kimi K2.7 Code 262,144 tokens
- Widest inputsInkling and Kimi K2.7 CodeInkling: Text, Images, Audio · GPT-5.4 mini: Text, Images · Kimi K2.7 Code: Text, Images, Video
- Self-hostingInkling and Kimi K2.7 CodePublishes downloadable weights (Apache-2.0)
| Measure | Weight | Inkling | GPT-5.4 mini | Kimi K2.7 Code |
|---|---|---|---|---|
| CapabilityCapabilities Index (ECI) | 50% | 75 | 75 | 77 |
| Price | 25% | 37 | 37 | 37 |
| Inputs & features | 15% | 70 | 70 | 80 |
| Context window | 10% | 61 | 44 | 37 |
| Overall | 100% | 63/100 | 62/100 | 63/100 |
Every spec in one table
Highlighted cells lead their row. Dashes mean the data is not published.
| Specification | InklingThinking Machines | GPT-5.4 miniOpenAI | Kimi K2.7 CodeMoonshot AI |
|---|---|---|---|
| Capability | |||
| Capabilities Index (ECI) | 148.5 | 148.8 | 150.2 (best) |
| ECI rank | #67 of 165 | #66 of 165 | #59 of 165 (best) |
| GPQA DiamondGraduate-level science questions | 88.3% (best) | 86.9% | 87.9% |
| FrontierMath Tiers 1–3Research-level mathematics | 33.3% | 51.2% | 54.0% (best) |
| OTIS Mock AIME 2024–2025Competition mathematics | 88.9% | 88.9% | 95.6% (best) |
| SimpleQA VerifiedShort factual questions | 40.3% (best) | 29.4% | 36.5% |
| Price per million tokens | |||
| Input | $1.00 | $0.75 (best) | $0.95 |
| Output | $4.05 | $4.50 | $4.00 (best) |
| Cached input | $0.17 | $0.075 (best) | $0.19 |
| Blended (3:1) | $1.76 | $1.69 (best) | $1.71 |
| Long-context rate | Same rate | Same rate | Same rate |
| Price source | Official Thinking Machines API | Official OpenAI API | Official Moonshot AI API |
| Limits | |||
| Context window | 1,048,576 tokens (best) | 400,000 tokens | 262,144 tokens |
| Max output | 1,048,576 tokens (best) | 128,000 tokens | 262,144 tokens |
| Inputs and features | |||
| Text | Yes | Yes | Yes |
| Images | Yes | Yes | Yes |
| PDFs | No | No | No |
| Audio | Yes | No | No |
| Video | No | No | Yes |
| Reasoning | Yeslow · medium · high · xhigh · max | Yeslow · medium · high · xhigh | Yes |
| Tool calling | Yes | Yes | Yes |
| Structured output | No | Yes | Yes |
| Availability | |||
| Weights | OpenApache-2.0 | Proprietary | Open |
| API model ID | thinkingmachines/Inkling:peft:262144:sampling-nvfp4 | gpt-5.4-mini | kimi-k2.7-code |
| API providers | 20 | 41 | 49 (best) |
| Released | Jul 15, 2026 | Mar 17, 2026 | Jun 12, 2026 |
| Knowledge cutoff | — | Aug 31, 2025 | Jan 2025 |
What would a month cost?
Enter your expected volume in millions of tokens. List prices only; caching and batch discounts would lower these.
- Inkling$18.10
- GPT-5.4 mini$16.50
- Kimi K2.7 Code$17.50
Which should you choose?
Which is better: Inkling, GPT-5.4 mini or Kimi K2.7 Code?
It is close. Our weighted score puts them within a point (Kimi K2.7 Code 63/100, Inkling 63/100, GPT-5.4 mini 62/100), so choose by what matters most for your work: Kimi K2.7 Code for raw capability, GPT-5.4 mini on price and Inkling for long inputs. The score weighs capability 50%, price 25%, inputs & features 15%, context window 10%.
Which is cheaper, Inkling, GPT-5.4 mini or Kimi K2.7 Code?
GPT-5.4 mini is cheaper at $0.75 input / $4.50 output per million tokens (official OpenAI API price). Kimi K2.7 Code costs $0.95 input / $4.00 output per million tokens (official Moonshot AI API price); Inkling costs $1.00 input / $4.05 output per million tokens (official Thinking Machines API price). At a typical mix of three input tokens to one output token, that is $1.69 per million tokens for GPT-5.4 mini versus $1.71 for Kimi K2.7 Code (1× as much) and $1.76 for Inkling (1× as much).
Which scores higher on benchmarks?
Kimi K2.7 Code scores higher on the Capabilities Index (ECI): Kimi K2.7 Code 150.2 (#59 of 165), GPT-5.4 mini 148.8 (#66 of 165) and Inkling 148.5 (#67 of 165). The confidence ranges of the top two overlap (148.1–151.9 vs 146.9–150.8), so treat the gap as small. On individual benchmarks: GPQA Diamond — Inkling 88.3%, Kimi K2.7 Code 87.9%, GPT-5.4 mini 86.9%; FrontierMath Tiers 1–3 — Kimi K2.7 Code 54.0%, GPT-5.4 mini 51.2%, Inkling 33.3%; OTIS Mock AIME 2024–2025 — Kimi K2.7 Code 95.6%, Inkling 88.9%, GPT-5.4 mini 88.9%; SimpleQA Verified — Inkling 40.3%, Kimi K2.7 Code 36.5%, GPT-5.4 mini 29.4%.
Which is better for coding?
There are no published SWE-bench Verified results for Inkling, GPT-5.4 mini and Kimi K2.7 Code yet, so there is no like-for-like coding score. On overall capability, Kimi K2.7 Code 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?
Inkling has the largest context window at 1,048,576 tokens, against 400,000 for GPT-5.4 mini and 262,144 for Kimi K2.7 Code. Maximum output per response: Inkling up to 1,048,576, GPT-5.4 mini up to 128,000, Kimi K2.7 Code up to 262,144 tokens.
Which can read images, PDFs, audio or video?
Inkling accepts text, images and audio; GPT-5.4 mini accepts text and images; Kimi K2.7 Code accepts text, images and video. Inkling handles the widest range of inputs.
Are any of these open source?
Inkling and Kimi K2.7 Code publishes its weights (Apache-2.0) and can be self-hosted; GPT-5.4 mini is proprietary.
Which is newer?
Inkling is the newest, released Jul 15, 2026. Kimi K2.7 Code came out Jun 12, 2026; GPT-5.4 mini came out Mar 17, 2026. Knowledge cutoff: GPT-5.4 mini Aug 31, 2025, Kimi K2.7 Code Jan 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.
